"Reloading" an NSBrowser bound to an NSTreeController

FROM : Adam Thorsen
DATE : Fri Jan 11 18:58:51 2008

At various points throughout the execution of my app, I need to 
refresh the data displayed in an NSBrowser with completely new data.

I have an NSBrowser(@millerBrowser) bound to an NSTreeController 
(@treeController), which is in turn bound to an array of NSTreeNodes 
(@remoteTree).

This is basically how I've been doing it (tree is the new data, 
@remoteTree is the old data):
@remoteTree and tree are both NSArrays containing NSTreeNodes.

        (@remoteTree removeAllObjects)
        (tree each:(do (branch)
                        (@remoteTree addObject:branch)))
        (set currentPath (@millerBrowser path))
        (@treeController rearrangeObjects)
        (@millerBrowser setPath:currentPath)

I've found that the problem with this is that it creates a HUGE memory 
leak (2MB per shot).  How can I safely replace the data without 
causing a huge memory leak?  Keep in mind that this is written in Nu, 
which is garbage collected using reference counting, so all I have to 
do is make sure the data in @remoteTree is no longer referenced.

Is there perhaps someway to remove the data through the 
NSTreeController?