Happens when reviewing a code in web-based crucible tools http://www.atlassian.com/software/crucible/ conditions to be met: - active review by a review member => click every line in code-view frame will create a dialog to insert a comment. - code-view frame contains both scroll-bars, horizontal and vertical What happens: - vertical scroll-bar (on the right side) move, or scroll wheel move won't redraw a screen - it looks like nothing has happened (except scroll-bar position). - litle move with horizontal scrollbar will cause redrawing the screen. - Troubles with scrolling at the page end - portion of the screen that could become empty remains unchanged. Note: * In case the review is closed or you are not a review member, then click to code has no effect (it's normal web page) then everything works well. * When code is not so wide and fit without horizontal scroll-bar, then it works correctly * Restart firefox in safe mode won't change the behavior * previous firefox 3.6 was correct. I can't provide link to our crucible project. It's private. You should be able to setup one on atlassian web page in sandbox.