Mysterious Redo crash

[Graham Cox]

I'm getting a crash sometimes when performing a Redo. Stack trace is  
below - seems as if it's something internal to the Undo Manager  
putting together the invocation. Any thoughts on how I can investigate  
this further? The Undos and Redos up until this point work fine as far  
as I can see.

#0      0x9358f6e8 in objc_msgSend
#1      0x92351306 in CFRetain
#2      0x922e15c4 in _CFArrayReplaceValues
#3      0x913299a3 in -[NSCFArray insertObject:atIndex:]
#4      0x91329914 in -[NSCFArray addObject:]
#5      0x923cd729 in __NSI3
#6      0x923ce2b5 in -[NSInvocation setArgument:atIndex:]
#7      0x923ce526 in -[NSInvocation invokeWithTarget:]
#8      0x91400e7c in -[_NSUndoInvocation invoke]
#9      0x91400be4 in -[_NSUndoStack popAndInvoke]
#10     0x914cbf07 in -[NSUndoManager redo]
#11     0x00230272 in -[DKUndoManager redo] at DKUndoManager.m:189
#12     0x90435c23 in -[NSApplication sendAction:to:from:]
#13     0x904e4660 in -[NSMenu performActionForItemAtIndex:]


tia,


Graham
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