User-Agent: Mozilla/5.0 (Windows NT 6.1; Win64; x64; rv:2.0b13pre) Gecko/20110226 Firefox/4.0b13pre Build Identifier: Mozilla/5.0 (Windows NT 6.1; Win64; x64; rv:2.0b13pre) Gecko/20110225 Firefox/4.0b13pre The left and right side of buttons, menu boxes, windows, and some numbers are not being drawn correctly. Small changes in the sizes of the Firefox window make a difference in how it appears. This problem did not happen with the last Windows version I was running. I don't know the previous version, probably from three days ago. Reproducible: Always about:support Graphics Adapter Description ATI Mobility Radeon HD 4650 Vendor ID 1002 Device ID 9480 Adapter RAM 1024 Adapter Drivers atiumd64 atidxx64 atiumdag atidxx32 atiumdva atiumd6a atitmm64 Driver Version 8.650.0.0 Driver Date 8-13-2009 Direct2D Enabled Blocked on your graphics driver. Try updating your graphics driver to version 10.6 or newer. DirectWrite Enabled false (6.1.7600.16699, font cache n/a) WebGL Renderer (WebGL unavailable) GPU Accelerated Windows 0/2