This bug report will be sent to the Free Software Foundation,
not to your local site managers!
Please write in English if possible, because the Emacs maintainers
usually do not have translators to read other languages for them.
Your report will be posted to the bug-gnu-emacs@gnu.org mailing list
and the gnu.emacs.bug news group, and at http://debbugs.gnu.org.
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':
Dear emacs hackers,
In short:
\C-x 3
try to drag the left border of the right window with the left mouse
button:
“Attempt to drag the rightmost scrollbar”
When I try to resize the windows, I get that error. When I have 3
windows, I can resize the left two windows, but not the right one.