Its good you spent time and posted bug report -- this way you certainly adding some amount on helping module evolve.
It seems to me posting here is not really on-the-topic, however.

In the meantime, did you tried same problem within Tcl/Tk, (so to help to isolate problem)?

Best regards,
Courage, the Cowardly Dog

In reply to Re: Gtk2 apps are seg-faulting my Tk apps by Courage
in thread Gtk2 apps are seg-faulting my Tk apps by zentara

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