Thanks Joe - I disabled hardware acceleration and that seems to have done the trick!
bodkin
ooops - how do you put jpgs on here :-) success....
Screenshot as requested. If the windows are resized, screen redraw happens very, very slowly...
Uninstalling firefox and doing a clean install of Firefox 4 hasn't helped in my case....
I uninstalled all my add-ons but the problem did not go away....
Disabling Adblock Plus and NoScript makes no difference. Did you mean uninstall them? The scroll bar does not paint in the first window that is opened - if i open a second window, it almost crashes firefox.
and theses Add-ons :- Adblock Plus 1.3.3 BetterPrivacy 1.49 FoxLingo 2.7.2 NoScript 2.0.9.9
WindowBlinds version : WindowBlinds 7.2 (build 95 x86) WindowBlinds is installed correctly on this PC WindowBlinds appears to be activated on this PC Your machine supports per pixel borders on WindowBlinds skins. (Plug and Play Monitor) 1 is attached to ATI Radeon HD 4550 (Plug and Play Monitor) 2 is attached to ATI Radeon HD 4550 Wblind.dll 2010/11/29 13:40:20 Wbsrv.dll &
I'm having the same problem as Jonathan, and scrolling locks up entirely...