[Robert Abitbol] This is a real drag as we used to say in the seventies.:) With a TCL program I use the backspace key and instead of going backwards, the function stays still and I get the impression that letters are falling in a sort of hole. 

How could I fix the problem?

Thanks once more teclers! 

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Instead of creating a new page, how about asking questions here: [Ask, and it shall be given # 2]

[Robert Abitbol] Good point! I did hesitate between writing my question in [Ask, and it shall be given # 2] or in a separate page. I opted for a separate page because this way, anyone who has a similar problem can enter the word backspace on the search for titles and he/she will get his/her answer to the problem right away instead of having the answer buried in a huge [Ask, and it shall be given # 2] page. It's just a matter of being more efficient, more functional.  

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[FW]: To me it sounds like you're saying the insertion cursor stays at the same place in the line when you backspace.  This doesn't happen for me, so it may be specific to the program you're using (perhaps alters the bindings?)  If you try a simple text widget
  pack [text .t]
does it still happen?
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