this is well known and fixed in Tk version 8.5.

(I'm not sure about latest Tk 8.4.14)

update: I was wrong, please '--' me.
I replied too fast without deep investigation

Sorrey!

In reply to Re: Bug in Win32 Perl/Tk Scrolled ROText widget with optional scrollbars by vkon
in thread Bug in Win32 Perl/Tk Scrolled ROText widget with optional scrollbars by liverpole

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