User-Agent: Mozilla/5.0 (Windows NT 6.1; rv:2.0b8pre) Gecko/20101209 Firefox/4.0b8pre Build Identifier: Mozilla/5.0 (Windows NT 6.1; rv:2.0b8pre) Gecko/20101208 Firefox/4.0b8pre When clicking on a dropdown box or typing into a text box that has autocomplete information remembered, those things are not drawing correctly. you see a partial outline of where the content should be rendered, and you can select it if you click properly or use the arrow keys, but cannot see the content. This is also happening with some UI, especially the Remember Password UI after entering login credentials for a website. Reproducible: Always Steps to Reproduce: 1. Navigate to any page (e.g., a bug report in BZ) 2. Attempt to click on a dropdown or enter text in a textbox with autocomplete. Actual Results: Cannot see the information. Expected Results: Should see the choices in the dropdown box or the autcomplete text under the text field. Occurring on a fresh install of Minefield, latest nightly build on Win 7. Not seeing this on same build on Mac OS X 10.6.4. I am using a Lenovo T410 running Win 7 Professional with the latest drivers from Lenovo and the latest patches from Microsoft. Build config: Source Built from http://hg.mozilla.org/mozilla-central/rev/11e328a49e0a Build platform target i686-pc-mingw32 Build tools Compiler Version Compiler flags d;D:\mozilla-build\msys\mozilla-build\python25\python2.5.exe -O e;D:\mozilla-build\msys\builds\moz2_slave\mozilla-central-win32-nightly\build\build\cl.py cl 14.00.50727.762 -TC -nologo -W3 -Gy -Fdgenerated.pdb -DNDEBUG -DTRIMMED -Zi -Zi -UDEBUG -DNDEBUG -GL -wd4624 -wd4952 -O1 d;D:\mozilla-build\msys\mozilla-build\python25\python2.5.exe -O e;D:\mozilla-build\msys\builds\moz2_slave\mozilla-central-win32-nightly\build\build\cl.py cl 14.00.50727.762 -GR- -TP -nologo -Zc:wchar_t- -W3 -Gy -Fdgenerated.pdb -wd4800 -DNDEBUG -DTRIMMED -Zi -Zi -UDEBUG -DNDEBUG -GL -wd4624 -wd4952 -O1 Configure arguments --enable-application=browser --enable-update-channel=nightly --enable-update-packaging --enable-jemalloc --enable-tests

screenshot of autocomplete box not drawing properly.

Is this tied to enabled Hardware Acceleration?

It appears to be. When I set gfx.direct2d.disabled to true, the issue stops. I wonder if it's an issue with the Lenovo driver for the NVS3100 on this laptop. I also work on a ThinkCentre M57p that has a QuadroFX 1700 in it and I am able to use the hardware acceleration with no issue.

Would be nice if you can post the Graphics Info from "about:support". Also please try to resolve the Issue by a Driver Update if possible.

Here is my about:support info: Graphics Adapter Description NVIDIA NVS 3100M Vendor ID 10de Device ID 0a6c Adapter RAM 256 Adapter Drivers nvd3dum nvwgf2um,nvwgf2um Driver Version 8.17.12.5738 Driver Date 6-27-2010 Direct2D Enabled false DirectWrite Enabled false GPU Accelerated Windows 1/1 Direct3D 9 I am running the latest available Lenovo driver.

I'm duping this Report against Bug 613790. Thanks for filling this one though!