bug#5177: 23.1.90; scrollbar thumb stops working after being dragged

Ken Brown skrev:
> Please write in English if possible, because the Emacs maintainers
> usually do not have translators to read other languages for them.
> 
> Your bug report will be posted to the [email protected] mailing 
> list.
> 
> Please describe exactly what actions triggered the bug
> and the precise symptoms of the bug.  If you can, give
> a recipe starting from `emacs -Q':
> 
> 1. Start the Gtk+ build of emacs.
> 2. Visit a file too big to fit in the window.
> 3. Drag the (vertical) scrollbar thumb.
> 4. Scroll through the buffer using the mouse wheel or keystrokes.
> 
> The scrollbar thumb stays fixed and no longer shows the relative
> position in the buffer.  Clicking in an empty area of the scrollbar
> restores the correct behavior.

This does not happen for me.  Must be Cygwin-specific.

	Jan D.