[Pythoncard-users] Mac PythonCard .81 Notebook crashing on quit (bus error)

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I've started building my application around the idea of a main tabbed 
window with a few small child windows spawned, and it seems to be working, 
but with one problem. Sometimes, when I quit PythonCard, it appears to 
hang for a few seconds, and the Python GUI environment crashes. Mac OS X 
presents a dialog saying that Python has unexpectedly quit, and the 
terminal shows a 'bus error.' This happens about 50% of the time when I 
quit my app, but I haven't yet taken the time to nail down a pattern. It 
may happen more when I spawn child windows.

I haven't see this problem yet under Windows XP.

Here is how I'm initializing the main window, based on the testNotebook.py 
sample code:


class MainWindow(model.Background):
 
        def on_initialize(self, event):
                # if you have any initialization
                # including sizer setup, do it here

                self.printer = HtmlEasyPrinting()
                # self.loadConfig()
                self.startTitle = self.title
 
                win2 = model.childWindow(self.components.notebook, 
widgets.WidgetsTest)
                self.components.notebook.AddPage(win2, 'widgets', True)

                win3 = model.childWindow(self.components.notebook, 
doodle.Doodle)
                self.components.notebook.AddPage(win3, 'doodle', True)
 
                win4 = model.childWindow(self.components.notebook, 
tabEmp.MyBackground)
                self.components.notebook.AddPage(win4, 'Employees', True)
 
                win5 = model.childWindow(self.components.notebook, 
tabMainMenu.MyBackground)
                self.components.notebook.AddPage(win5, 'Main', True)
 
                page = self.components.notebook.getPage(3)
                size = page.size
                wx.CallAfter(page.SetSize, size)

                print "number of pages:", 
self.components.notebook.getPageCount()
                print "last page text: %s\n" % \
 
self.components.notebook.getPageText(self.components.notebook.getPageCount() 
- 1)
 
                print "stringSelection:", 
self.components.notebook.stringSelection
                self.components.notebook.stringSelection = 'Main'