Your welcome. Actually it was a fellow named Ben Crowell, who solved it. He saw the bug on Ubuntu and complained in comp.lang.perl.tk. I mentioned that I saw this bug myself, and pointed him to my debug output. He came up with the fix. Currently Nick Ing-Simmons is looking at it, and will probably issue a patch.

I also am glad it's fixed. I was getting awfully tired of having to restart my Tk apps.