Comment 12 for bug 110442

This is broken for me, as well, on Windows XP Pro SP2 and Vista Ultimate. Both machines are using NVIDIA cards. I'm using "Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.8.1.11) Gecko/20071127 Firefox/2.0.0.11".

I've attached the requested screen shot. To do this, I just:

1) Navigated to hotmail
2) Logged in
3) opened an email
4) Scrolled down.

It occurs if I scroll down with the mouse wheel, or by dragging the mouse along the scroll bar's thumb track.

If I force the window to repaint (by dragging it off screen and then back on, or by obscuring it) it comes back just fine, so maybe the problem is an off-by-one in the Y direction in a call to ScrollWindow().

Please let me know if you need any other details; I hope this can be fixed as it's very annoying -- and even more annoying, now that I know the team has been aware of the problem for some months.