To reproduce:

1. open the bugtracker on any project/filter.
2. hever over the bug list scrollbar.
3.  the resize cursor is displayed on most of the width of the scrollbar.
4. Try to use it.
5.  You can't.

This is specially an issue with users without a mouse, as build-in touchpads don't have a scrollbar, and arrow keys only work when first having clicked in the window, which you ussually don't want to do as it results in the page being changed.

I can't upload any screenshots as theydon't show my cursor and thus are useless