[wxPython] wxHtmlEasyPrinting, and apps not quitting properly

I noticed that the wxHtmlWindow.py example does not always quit right:
the window closes, but python doesn't close and return me to my prompt.
In fact, it continues using all the remaining CPU power that's free...
until I ctrl-c it.

I didn't think much of it, until I started using wxHtmlEasyPrinting in
my project. Now it too doesn't always quit right. Any ideas what this
might be, or how I can help debug it? I have Debian, with the 2.2.9.2
version of the libwxgtk2.2-python package. I will be testing this on
Windows too some time soonish, with wxPython 2.3.2.1.

The other problem I have is that GhostView cannot open the postscript
files produced by "print to file". But this I guess I should take to the
main wxWindows list? I have yet to try actually sending this to a
printer. (Haven't got a printer connected to my machine atm.)

Thanks,
Hugo van der Merwe