diff --git a/autoload/nerdtree/ui_glue.vim b/autoload/nerdtree/ui_glue.vim
index 604a637..05f03c9 100644
--- a/autoload/nerdtree/ui_glue.vim
+++ b/autoload/nerdtree/ui_glue.vim
@@ -105,7 +105,7 @@ endfunction
 "FUNCTION: s:activateBookmark() {{{1
 "handle the user activating a bookmark
 function! s:activateBookmark(bm)
-    call a:bm.activate(!a:bm.path.isDirectory ? {'where': 'p'} : {})
+    call a:bm.activate(b:NERDTree, !a:bm.path.isDirectory ? {'where': 'p'} : {})
 endfunction
 
 " FUNCTION: nerdtree#ui_glue#bookmarkNode(name) {{{1
@@ -155,7 +155,7 @@ function! nerdtree#ui_glue#chRootCwd()
     if cwd.str() == g:NERDTreeFileNode.GetRootForTab().path.str()
        return
     endif
-    call s:chRoot(g:NERDTreeDirNode.New(cwd))
+    call s:chRoot(g:NERDTreeDirNode.New(cwd, b:NERDTree))
 endfunction
 
 " FUNCTION: nnerdtree#ui_glue#clearBookmarks(bookmarks) {{{1
@@ -171,6 +171,7 @@ function! nerdtree#ui_glue#clearBookmarks(bookmarks)
             call bookmark.delete()
         endfor
     endif
+    call b:NERDTree.root.refresh()
     call b:NERDTree.render()
 endfunction
 
@@ -225,6 +226,7 @@ function! s:deleteBookmark(bm)
     if  nr2char(getchar()) ==# 'y'
         try
             call a:bm.delete()
+            call b:NERDTree.root.refresh()
             call b:NERDTree.render()
             redraw
         catch /^NERDTree/
@@ -279,7 +281,7 @@ function! s:findAndRevealPath()
                 call g:NERDTree.CursorToTreeWin()
             endif
             call b:NERDTree.setShowHidden(g:NERDTreeShowHidden)
-            call s:chRoot(g:NERDTreeDirNode.New(p.getParent()))
+            call s:chRoot(g:NERDTreeDirNode.New(p.getParent(), b:NERDTree))
         else
             if !g:NERDTree.IsOpen()
                 call g:NERDTreeCreator.ToggleTabTree("")
@@ -442,13 +444,13 @@ endfunction
 " put the cursor on the given bookmark and, if its a file, open it
 function! nerdtree#ui_glue#openBookmark(name)
     try
-        let targetNode = g:NERDTreeBookmark.GetNodeForName(a:name, 0)
+        let targetNode = g:NERDTreeBookmark.GetNodeForName(a:name, 0, b:NERDTree)
         call targetNode.putCursorHere(0, 1)
         redraw!
     catch /^NERDTree.BookmarkedNodeNotFoundError/
         call nerdtree#echo("note - target node is not cached")
         let bookmark = g:NERDTreeBookmark.BookmarkFor(a:name)
-        let targetNode = g:NERDTreeFileNode.New(bookmark.path)
+        let targetNode = g:NERDTreeFileNode.New(bookmark.path, b:NERDTree)
     endtry
     if targetNode.path.isDirectory
         call targetNode.openExplorer()
@@ -510,7 +512,7 @@ endfunction
 " put the cursor on the node associate with the given name
 function! nerdtree#ui_glue#revealBookmark(name)
     try
-        let targetNode = g:NERDTreeBookmark.GetNodeForName(a:name, 0)
+        let targetNode = g:NERDTreeBookmark.GetNodeForName(a:name, 0, b:NERDTree)
         call targetNode.putCursorHere(0, 1)
     catch /^NERDTree.BookmarkNotFoundError/
         call nerdtree#echo("Bookmark isnt cached under the current root")
@@ -614,7 +616,7 @@ function! nerdtree#ui_glue#upDir(keepState)
 
         if empty(b:NERDTree.root.parent)
             let path = b:NERDTree.root.path.getParent()
-            let newRoot = g:NERDTreeDirNode.New(path)
+            let newRoot = g:NERDTreeDirNode.New(path, b:NERDTree)
             call newRoot.open()
             call newRoot.transplantChild(b:NERDTree.root)
             let b:NERDTree.root = newRoot
diff --git a/lib/nerdtree/bookmark.vim b/lib/nerdtree/bookmark.vim
index f481501..8124260 100644
--- a/lib/nerdtree/bookmark.vim
+++ b/lib/nerdtree/bookmark.vim
@@ -3,9 +3,9 @@
 let s:Bookmark = {}
 let g:NERDTreeBookmark = s:Bookmark
 
-" FUNCTION: Bookmark.activate() {{{1
-function! s:Bookmark.activate(...)
-    call self.open(a:0 ? a:1 : {})
+" FUNCTION: Bookmark.activate(nerdtree) {{{1
+function! s:Bookmark.activate(nerdtree, ...)
+    call self.open(a:nerdtree, a:0 ? a:1 : {})
 endfunction
 
 " FUNCTION: Bookmark.AddBookmark(name, path) {{{1
@@ -128,26 +128,18 @@ endfunction
 " Delete this bookmark. If the node for this bookmark is under the current
 " root, then recache bookmarks for its Path object
 function! s:Bookmark.delete()
-    let node = {}
-    try
-        let node = self.getNode(1)
-    catch /^NERDTree.BookmarkedNodeNotFoundError/
-    endtry
     call remove(s:Bookmark.Bookmarks(), index(s:Bookmark.Bookmarks(), self))
-    if !empty(node)
-        call node.path.cacheDisplayString()
-    endif
     call s:Bookmark.Write()
 endfunction
 
-" FUNCTION: Bookmark.getNode(searchFromAbsoluteRoot) {{{1
+" FUNCTION: Bookmark.getNode(nerdtree, searchFromAbsoluteRoot) {{{1
 " Gets the treenode for this bookmark
 "
 " Args:
 " searchFromAbsoluteRoot: specifies whether we should search from the current
 " tree root, or the highest cached node
-function! s:Bookmark.getNode(searchFromAbsoluteRoot)
-    let searchRoot = a:searchFromAbsoluteRoot ? g:NERDTreeDirNode.AbsoluteTreeRoot() : b:NERDTree.root
+function! s:Bookmark.getNode(nerdtree, searchFromAbsoluteRoot)
+    let searchRoot = a:searchFromAbsoluteRoot ? a:nerdtree.root.AbsoluteTreeRoot() : a:nerdtree.root
     let targetNode = searchRoot.findNode(self.path)
     if empty(targetNode)
         throw "NERDTree.BookmarkedNodeNotFoundError: no node was found for bookmark: " . self.name
@@ -155,12 +147,12 @@ function! s:Bookmark.getNode(searchFromAbsoluteRoot)
     return targetNode
 endfunction
 
-" FUNCTION: Bookmark.GetNodeForName(name, searchFromAbsoluteRoot) {{{1
+" FUNCTION: Bookmark.GetNodeForName(name, searchFromAbsoluteRoot, nerdtree) {{{1
 " Class method that finds the bookmark with the given name and returns the
 " treenode for it.
-function! s:Bookmark.GetNodeForName(name, searchFromAbsoluteRoot)
+function! s:Bookmark.GetNodeForName(name, searchFromAbsoluteRoot, nerdtree)
     let bookmark = s:Bookmark.BookmarkFor(a:name)
-    return bookmark.getNode(a:searchFromAbsoluteRoot)
+    return bookmark.getNode(nerdtree, a:searchFromAbsoluteRoot)
 endfunction
 
 " FUNCTION: Bookmark.GetSelected() {{{1
@@ -210,8 +202,11 @@ function! s:Bookmark.New(name, path)
     return newBookmark
 endfunction
 
-" FUNCTION: Bookmark.open([options]) {{{1
+" FUNCTION: Bookmark.open(nerdtree, [options]) {{{1
 "Args:
+"
+"nerdtree: the tree to load open the bookmark in
+"
 "A dictionary containing the following keys (all optional):
 "  'where': Specifies whether the node should be opened in new split/tab or in
 "           the previous window. Can be either 'v' (vertical split), 'h'
@@ -220,11 +215,11 @@ endfunction
 "  'keepopen': dont close the tree window
 "  'stay': open the file, but keep the cursor in the tree win
 "
-function! s:Bookmark.open(...)
+function! s:Bookmark.open(nerdtree, ...)
     let opts = a:0 ? a:1 : {}
 
     if self.path.isDirectory && !has_key(opts, 'where')
-        call self.toRoot()
+        call self.toRoot(a:nerdtree)
     else
         let opener = g:NERDTreeOpener.New(self.path, opts)
         call opener.open(self)
@@ -266,24 +261,24 @@ function! s:Bookmark.str()
     return '>' . self.name . ' ' . pathStr
 endfunction
 
-" FUNCTION: Bookmark.toRoot() {{{1
+" FUNCTION: Bookmark.toRoot(nerdtree) {{{1
 " Make the node for this bookmark the new tree root
-function! s:Bookmark.toRoot()
+function! s:Bookmark.toRoot(nerdtree)
     if self.validate()
         try
-            let targetNode = self.getNode(1)
+            let targetNode = self.getNode(a:nerdtree, 1)
         catch /^NERDTree.BookmarkedNodeNotFoundError/
-            let targetNode = g:NERDTreeFileNode.New(s:Bookmark.BookmarkFor(self.name).path)
+            let targetNode = g:NERDTreeFileNode.New(s:Bookmark.BookmarkFor(self.name).path, a:nerdtree)
         endtry
-        call b:NERDTree.changeRoot(targetNode)
+        call a:nerdtree.changeRoot(targetNode)
     endif
 endfunction
 
-" FUNCTION: Bookmark.ToRoot(name) {{{1
+" FUNCTION: Bookmark.ToRoot(name, nerdtree) {{{1
 " Make the node for this bookmark the new tree root
-function! s:Bookmark.ToRoot(name)
+function! s:Bookmark.ToRoot(name, nerdtree)
     let bookmark = s:Bookmark.BookmarkFor(a:name)
-    call bookmark.toRoot()
+    call bookmark.toRoot(a:nerdtree)
 endfunction
 
 " FUNCTION: Bookmark.validate() {{{1
@@ -292,7 +287,6 @@ function! s:Bookmark.validate()
         return 1
     else
         call s:Bookmark.CacheBookmarks(1)
-        call b:NERDTree.render()
         call nerdtree#echo(self.name . "now points to an invalid location. See :help NERDTreeInvalidBookmarks for info.")
         return 0
     endif
diff --git a/lib/nerdtree/creator.vim b/lib/nerdtree/creator.vim
index 2141170..f6e857d 100644
--- a/lib/nerdtree/creator.vim
+++ b/lib/nerdtree/creator.vim
@@ -16,7 +16,7 @@ function! s:Creator._bindMappings()
     command! -buffer -complete=customlist,nerdtree#completeBookmarks -nargs=1 RevealBookmark :call nerdtree#ui_glue#revealBookmark('<args>')
     command! -buffer -complete=customlist,nerdtree#completeBookmarks -nargs=1 OpenBookmark :call nerdtree#ui_glue#openBookmark('<args>')
     command! -buffer -complete=customlist,nerdtree#completeBookmarks -nargs=* ClearBookmarks call nerdtree#ui_glue#clearBookmarks('<args>')
-    command! -buffer -complete=customlist,nerdtree#completeBookmarks -nargs=+ BookmarkToRoot call g:NERDTreeBookmark.ToRoot('<args>')
+    command! -buffer -complete=customlist,nerdtree#completeBookmarks -nargs=+ BookmarkToRoot call g:NERDTreeBookmark.ToRoot('<args>', b:NERDTree)
     command! -buffer -nargs=0 ClearAllBookmarks call g:NERDTreeBookmark.ClearAll() <bar> call b:NERDTree.render()
     command! -buffer -nargs=0 ReadBookmarks call g:NERDTreeBookmark.CacheBookmarks(0) <bar> call b:NERDTree.render()
     command! -buffer -nargs=0 WriteBookmarks call g:NERDTreeBookmark.Write()
diff --git a/lib/nerdtree/nerdtree.vim b/lib/nerdtree/nerdtree.vim
index 9e38b3a..284111a 100644
--- a/lib/nerdtree/nerdtree.vim
+++ b/lib/nerdtree/nerdtree.vim
@@ -148,7 +148,7 @@ endfunction
 function! s:NERDTree.New(path, type)
     let newObj = copy(self)
     let newObj.ui = g:NERDTreeUI.New(newObj)
-    let newObj.root = g:NERDTreeDirNode.New(a:path)
+    let newObj.root = g:NERDTreeDirNode.New(a:path, newObj)
     let newObj._type = a:type
     return newObj
 endfunction
diff --git a/lib/nerdtree/notifier.vim b/lib/nerdtree/notifier.vim
index b445f8a..00041b8 100644
--- a/lib/nerdtree/notifier.vim
+++ b/lib/nerdtree/notifier.vim
@@ -11,8 +11,8 @@ function! s:Notifier.AddListener(event, funcname)
     call add(listeners, a:funcname)
 endfunction
 
-function! s:Notifier.NotifyListeners(event, path, params)
-    let event = g:NERDTreeEvent.New(b:NERDTree, a:path, a:event, a:params)
+function! s:Notifier.NotifyListeners(event, path, nerdtree, params)
+    let event = g:NERDTreeEvent.New(a:nerdtree, a:path, a:event, a:params)
 
     for listener in s:Notifier.GetListenersForEvent(a:event)
         call {listener}(event)
diff --git a/lib/nerdtree/path.vim b/lib/nerdtree/path.vim
index 4a2314e..f52426d 100644
--- a/lib/nerdtree/path.vim
+++ b/lib/nerdtree/path.vim
@@ -406,11 +406,11 @@ function! s:Path.isUnixHiddenPath()
     endif
 endfunction
 
-"FUNCTION: Path.ignore() {{{1
+"FUNCTION: Path.ignore(nerdtree) {{{1
 "returns true if this path should be ignored
-function! s:Path.ignore()
+function! s:Path.ignore(nerdtree)
     "filter out the user specified paths to ignore
-    if b:NERDTree.ui.isIgnoreFilterEnabled()
+    if a:nerdtree.ui.isIgnoreFilterEnabled()
         for i in g:NERDTreeIgnore
             if self._ignorePatternMatches(i)
                 return 1
@@ -418,18 +418,18 @@ function! s:Path.ignore()
         endfor
 
         for callback in g:NERDTree.PathFilters()
-            if {callback}({'path': self, 'nerdtree': b:NERDTree})
+            if {callback}({'path': self, 'nerdtree': a:nerdtree})
                 return 1
             endif
         endfor
     endif
 
     "dont show hidden files unless instructed to
-    if !b:NERDTree.ui.getShowHidden() && self.isUnixHiddenFile()
+    if !a:nerdtree.ui.getShowHidden() && self.isUnixHiddenFile()
         return 1
     endif
 
-    if b:NERDTree.ui.getShowFiles() ==# 0 && self.isDirectory ==# 0
+    if a:nerdtree.ui.getShowFiles() ==# 0 && self.isDirectory ==# 0
         return 1
     endif
 
@@ -572,16 +572,16 @@ function! s:Path.readInfoFromDisk(fullpath)
     endif
 endfunction
 
-"FUNCTION: Path.refresh() {{{1
-function! s:Path.refresh()
+"FUNCTION: Path.refresh(nerdtree) {{{1
+function! s:Path.refresh(nerdtree)
     call self.readInfoFromDisk(self.str())
-    call g:NERDTreePathNotifier.NotifyListeners('refresh', self, {})
+    call g:NERDTreePathNotifier.NotifyListeners('refresh', self, a:nerdtree, {})
     call self.cacheDisplayString()
 endfunction
 
-"FUNCTION: Path.refreshFlags() {{{1
-function! s:Path.refreshFlags()
-    call g:NERDTreePathNotifier.NotifyListeners('refreshFlags', self, {})
+"FUNCTION: Path.refreshFlags(nerdtree) {{{1
+function! s:Path.refreshFlags(nerdtree)
+    call g:NERDTreePathNotifier.NotifyListeners('refreshFlags', self, a:nerdtree, {})
     call self.cacheDisplayString()
 endfunction
 
diff --git a/lib/nerdtree/tree_dir_node.vim b/lib/nerdtree/tree_dir_node.vim
index 4943b9b..673f452 100644
--- a/lib/nerdtree/tree_dir_node.vim
+++ b/lib/nerdtree/tree_dir_node.vim
@@ -21,7 +21,7 @@ unlet s:TreeDirNode.activate
 function! s:TreeDirNode.activate(...)
     let opts = a:0 ? a:1 : {}
     call self.toggleOpen(opts)
-    call b:NERDTree.render()
+    call self.getNerdtree().render()
     call self.putCursorHere(0, 0)
 endfunction
 
@@ -68,7 +68,7 @@ endfunction
 "Returns:
 "the newly created node
 function! s:TreeDirNode.createChild(path, inOrder)
-    let newTreeNode = g:NERDTreeFileNode.New(a:path)
+    let newTreeNode = g:NERDTreeFileNode.New(a:path, self.getNerdtree())
     call self.addChild(newTreeNode, a:inOrder)
     return newTreeNode
 endfunction
@@ -205,7 +205,7 @@ endfunction
 function! s:TreeDirNode.getVisibleChildren()
     let toReturn = []
     for i in self.children
-        if i.path.ignore() ==# 0
+        if i.path.ignore(self.getNerdtree()) ==# 0
             call add(toReturn, i)
         endif
     endfor
@@ -258,7 +258,7 @@ function! s:TreeDirNode._initChildren(silent)
             try
                 let path = g:NERDTreePath.New(i)
                 call self.createChild(path, 0)
-                call g:NERDTreePathNotifier.NotifyListeners('init', path, {})
+                call g:NERDTreePathNotifier.NotifyListeners('init', path, self.getNerdtree(), {})
             catch /^NERDTree.\(InvalidArguments\|InvalidFiletype\)Error/
                 let invalidFilesFound += 1
             endtry
@@ -277,13 +277,13 @@ function! s:TreeDirNode._initChildren(silent)
     return self.getChildCount()
 endfunction
 
-"FUNCTION: TreeDirNode.New(path) {{{1
+"FUNCTION: TreeDirNode.New(path, nerdtree) {{{1
 "Returns a new TreeNode object with the given path and parent
 "
 "Args:
-"path: a path object representing the full filesystem path to the file/dir that the node represents
-unlet s:TreeDirNode.New
-function! s:TreeDirNode.New(path)
+"path: dir that the node represents
+"nerdtree: the tree the node belongs to
+function! s:TreeDirNode.New(path, nerdtree)
     if a:path.isDirectory != 1
         throw "NERDTree.InvalidArgumentsError: A TreeDirNode object must be instantiated with a directory Path object."
     endif
@@ -295,6 +295,7 @@ function! s:TreeDirNode.New(path)
     let newTreeNode.children = []
 
     let newTreeNode.parent = {}
+    let newTreeNode._nerdtree = a:nerdtree
 
     return newTreeNode
 endfunction
@@ -379,7 +380,7 @@ endfunction
 "Args:
 "forceOpen: 1 if this node should be opened regardless of file filters
 function! s:TreeDirNode._openRecursively2(forceOpen)
-    if self.path.ignore() ==# 0 || a:forceOpen
+    if self.path.ignore(self.getNerdtree()) ==# 0 || a:forceOpen
         let self.isOpen = 1
         if self.children ==# []
             call self._initChildren(1)
@@ -396,7 +397,7 @@ endfunction
 "FUNCTION: TreeDirNode.refresh() {{{1
 unlet s:TreeDirNode.refresh
 function! s:TreeDirNode.refresh()
-    call self.path.refresh()
+    call self.path.refresh(self.getNerdtree())
 
     "if this node was ever opened, refresh its children
     if self.isOpen || !empty(self.children)
@@ -427,7 +428,7 @@ function! s:TreeDirNode.refresh()
 
                     "the node doesnt exist so create it
                     else
-                        let newNode = g:NERDTreeFileNode.New(path)
+                        let newNode = g:NERDTreeFileNode.New(path, self.getNerdtree())
                         let newNode.parent = self
                         call add(newChildNodes, newNode)
                     endif
@@ -452,7 +453,7 @@ endfunction
 "FUNCTION: TreeDirNode.refreshFlags() {{{1
 unlet s:TreeDirNode.refreshFlags
 function! s:TreeDirNode.refreshFlags()
-    call self.path.refreshFlags()
+    call self.path.refreshFlags(self.getNerdtree())
     for i in self.children
         call i.refreshFlags()
     endfor
@@ -460,7 +461,7 @@ endfunction
 
 "FUNCTION: TreeDirNode.refreshDirFlags() {{{1
 function! s:TreeDirNode.refreshDirFlags()
-    call self.path.refreshFlags()
+    call self.path.refreshFlags(self.getNerdtree())
 endfunction
 
 "FUNCTION: TreeDirNode.reveal(path) {{{1
diff --git a/lib/nerdtree/tree_file_node.vim b/lib/nerdtree/tree_file_node.vim
index 150b03a..ac2f31c 100644
--- a/lib/nerdtree/tree_file_node.vim
+++ b/lib/nerdtree/tree_file_node.vim
@@ -19,7 +19,7 @@ function! s:TreeFileNode.bookmark(name)
     "it so we can update its display string
     let oldMarkedNode = {}
     try
-        let oldMarkedNode = g:NERDTreeBookmark.GetNodeForName(a:name, 1)
+        let oldMarkedNode = g:NERDTreeBookmark.GetNodeForName(a:name, 1, self.getNerdtree())
     catch /^NERDTree.BookmarkNotFoundError/
     catch /^NERDTree.BookmarkedNodeNotFoundError/
     endtry
@@ -41,7 +41,7 @@ function! s:TreeFileNode.cacheParent()
         if parentPath.equals(self.path)
             throw "NERDTree.CannotCacheParentError: already at root"
         endif
-        let self.parent = s:TreeFileNode.New(parentPath)
+        let self.parent = s:TreeFileNode.New(parentPath, self.getNerdtree())
     endif
 endfunction
 
@@ -59,7 +59,7 @@ endfunction
 function! s:TreeFileNode.copy(dest)
     call self.path.copy(a:dest)
     let newPath = g:NERDTreePath.New(a:dest)
-    let parent = b:NERDTree.root.findNode(newPath.getParent())
+    let parent = self.getNerdtree().root.findNode(newPath.getParent())
     if !empty(parent)
         call parent.refresh()
         return parent.findNode(newPath)
@@ -165,7 +165,7 @@ function! s:TreeFileNode.findSibling(direction)
 
                 "if the next node is not an ignored node (i.e. wont show up in the
                 "view) then return it
-                if self.parent.children[siblingIndx].path.ignore() ==# 0
+                if self.parent.children[siblingIndx].path.ignore(self.getNerdtree()) ==# 0
                     return self.parent.children[siblingIndx]
                 endif
 
@@ -178,6 +178,11 @@ function! s:TreeFileNode.findSibling(direction)
     return {}
 endfunction
 
+"FUNCTION: TreeFileNode.getNerdtree(){{{1
+function! s:TreeFileNode.getNerdtree()
+    return self._nerdtree
+endfunction
+
 "FUNCTION: TreeFileNode.GetRootForTab(){{{1
 "get the root node for this tab
 function! s:TreeFileNode.GetRootForTab()
@@ -205,31 +210,32 @@ endfunction
 "returns 1 if this node should be visible according to the tree filters and
 "hidden file filters (and their on/off status)
 function! s:TreeFileNode.isVisible()
-    return !self.path.ignore()
+    return !self.path.ignore(self.getNerdtree())
 endfunction
 
 "FUNCTION: TreeFileNode.isRoot() {{{1
-"returns 1 if this node is b:NERDTree.root
 function! s:TreeFileNode.isRoot()
     if !g:NERDTree.ExistsForBuf()
         throw "NERDTree.NoTreeError: No tree exists for the current buffer"
     endif
 
-    return self.equals(b:NERDTree.root)
+    return self.equals(self.getNerdtree().root)
 endfunction
 
-"FUNCTION: TreeFileNode.New(path) {{{1
+"FUNCTION: TreeFileNode.New(path, nerdtree) {{{1
 "Returns a new TreeNode object with the given path and parent
 "
 "Args:
-"path: a path object representing the full filesystem path to the file/dir that the node represents
-function! s:TreeFileNode.New(path)
+"path: file/dir that the node represents
+"nerdtree: the tree the node belongs to
+function! s:TreeFileNode.New(path, nerdtree)
     if a:path.isDirectory
-        return g:NERDTreeDirNode.New(a:path)
+        return g:NERDTreeDirNode.New(a:path, a:nerdtree)
     else
         let newTreeNode = copy(self)
         let newTreeNode.path = a:path
         let newTreeNode.parent = {}
+        let newTreeNode._nerdtree = a:nerdtree
         return newTreeNode
     endif
 endfunction
@@ -269,7 +275,7 @@ endfunction
 "recurseUpward: try to put the cursor on the parent if the this node isnt
 "visible
 function! s:TreeFileNode.putCursorHere(isJump, recurseUpward)
-    let ln = b:NERDTree.ui.getLineNum(self)
+    let ln = self.getNerdtree().ui.getLineNum(self)
     if ln != -1
         if a:isJump
             mark '
@@ -278,11 +284,11 @@ function! s:TreeFileNode.putCursorHere(isJump, recurseUpward)
     else
         if a:recurseUpward
             let node = self
-            while node != {} && b:NERDTree.ui.getLineNum(node) ==# -1
+            while node != {} && self.getNerdtree().ui.getLineNum(node) ==# -1
                 let node = node.parent
                 call node.open()
             endwhile
-            call b:NERDTree.render()
+            call self.getNerdtree().render()
             call node.putCursorHere(a:isJump, 0)
         endif
     endif
@@ -290,12 +296,12 @@ endfunction
 
 "FUNCTION: TreeFileNode.refresh() {{{1
 function! s:TreeFileNode.refresh()
-    call self.path.refresh()
+    call self.path.refresh(self.getNerdtree())
 endfunction
 
 "FUNCTION: TreeFileNode.refreshFlags() {{{1
 function! s:TreeFileNode.refreshFlags()
-    call self.path.refreshFlags()
+    call self.path.refreshFlags(self.getNerdtree())
 endfunction
 
 "FUNCTION: TreeFileNode.rename() {{{1
@@ -306,7 +312,7 @@ function! s:TreeFileNode.rename(newName)
     call self.parent.removeChild(self)
 
     let parentPath = self.path.getParent()
-    let newParent = b:NERDTree.root.findNode(parentPath)
+    let newParent = self.getNerdtree().root.findNode(parentPath)
 
     if newParent != {}
         call newParent.createChild(self.path, 1)
diff --git a/nerdtree_plugin/fs_menu.vim b/nerdtree_plugin/fs_menu.vim
index 315a789..20a9fcd 100644
--- a/nerdtree_plugin/fs_menu.vim
+++ b/nerdtree_plugin/fs_menu.vim
@@ -107,7 +107,7 @@ function! NERDTreeAddNode()
         let newPath = g:NERDTreePath.Create(newNodeName)
         let parentNode = b:NERDTree.root.findNode(newPath.getParent())
 
-        let newTreeNode = g:NERDTreeFileNode.New(newPath)
+        let newTreeNode = g:NERDTreeFileNode.New(newPath, b:NERDTree)
         if empty(parentNode)
             call b:NERDTree.root.refresh()
             call b:NERDTree.render()