Hi and thanks for the quick response.

I'm happy to follow up with the Tk folks if it turns out that's where
the problem lies -- it has been a long time since I wrote a Tcl script
so before trying to reproduce the behavior that way I thought I'd try
posting what I have so far.

If you can just confirm that the behavior is reproducible that would
be a good start.  As I wrote, I have built everything from sources on
Windows so there's always a chance I've done something wrong, although
so much is working correctly that I don't expect that to be the case.

I'm trying to introduce Python as a development tool at a consulting
client (a large company) so I have to pursue stuff like this.

Thanks again.