From Bugzilla Helper: User-Agent: Mozilla/5.0 (Macintosh; U; PPC Mac OS X; en-US; rv:1.1) Gecko/20020814 BuildID: 2002081416 In news header window, there are enough headers that I see maybe 10% of them. I click the scrollbar trough below the thumb. The window scrolls twice. Not just scrolling 2x the headers expected, but visibly scrolls twice. If I click close enough to the thumb that the thumb will be under the click position after one scroll, then it only scrolls once. This happens when scrolling up or down. I've only checked with news. I use Apple's mail client to read mail, so I don't know if it would happen for mail also. Reproducible: Always Steps to Reproduce: 1. Go to a newsgroup with lots of messages so that you've got at least 3 windows of headers 2. Click scrollbar well below the scrollbar thumb 3. watch it scroll twice Actual Results: Scrolled twice Expected Results: Should have scrolled once

This is a dup of a very similar bug filed about the History window. Adding DUPEME/qawanted.

*** This bug has been marked as a duplicate of 144844 ***

Verified dup