From: Albert Wagner <alwagner@...>
Date: 2002-07-18T01:40:55+09:00
Subject: Tk:  event.widget.callback_break

Did Tk change between 1.6.5 and 1.6.7?  After several months occupied with 
other chores, and then installing 1.6.7 I find that some old code (vintage 
1.6.5) using TkText::callback_break no longer works.