I just spent a week with this bug and related issues over installing a openGL driver for my video card.
I regularly got the messages cited in this bug. The cause in Tcl/Tk 8.2 and the togl widget. As far as I can tell the togl widget was upgraded to work with Tcl/Tk 8.0 but NOT 8.2.
I down graded from 8.2 to 8.0 and this fixed my problems.
Hope this helps squash this bug.
-Tom Rake, The Duff Map Company.
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