User-Agent: Mozilla/5.0 (Windows NT 6.1; Win64; x64; rv:2.2a1pre) Gecko/20110326 Firefox/4.2a1pre Build Identifier: Mozilla/5.0 (Windows NT 6.1; Win64; x64; rv:2.2a1pre) Gecko/20110326 Firefox/4.2a1pre Every time I start the browser, tabs, back / forth buttons, and other components of the interface are not correctly rendered (here the link with the image: http://i51.tinypic.com/kcnih1.jpg). Reproducible: Always Steps to Reproduce: 1. Installing a clean installation of Firefox. 2. Start the browser. 3. Tried on Win 7 64 bit, SP1, newest Catalyst drivers, clean installation of Firefox.

Is this a recent regression or a ~2 week old bug ? i can dupe this bug depending on the answer.

(In reply to comment #1) > Is this a recent regression or a ~2 week old bug ? > i can dupe this bug depending on the answer. I'm not sure whether this is the same bug, I first installed the release yesterday and the bug was there from the first start. Today I downloaded the new build (first thru auto - update, later downloaded the new installer). Btw. if it is any help, it happens only in x64 version, now I tried x32 and the interface renders normally.

There is no official windows 64 Release, it's currently not supported. bug 644877 is the recent regression for the nightly builds and bug 635463 for the older problem