I executed AutoJ2DGraphics from 2D testbase on WinXP - Nvidia GeForce 7600, installed with the latest driver. There are some differences here caused by minor (acceptable) differences in pixel interpolation between our software loops and D3D. The main problem here that does look like a bug though is the fact that the middle square is completely blank in the test image.

Golden image was taken from 6u3 release and hence this bug is specific to 6u4-b01 PIT build.

Take a look at the detailed report here -
http://sqeweb.sfbay/2d/release/jdk6u4/pit/results/b01/WinXP-Nvidia_GeForce7600/Test_Report.html

I have also attached the golden, test and diff images to this bug report.

To reproduce the bug, do the following -
1. Go to /net/sqe1.sfbay/quality2/2d/Mustang_2d_ws/2d/src/2D_AutoJ2DGraphics
2. Set PATH to GNUMAKE and set JAVA_HOME to D3D build.
3. give 'gnumake runauto'.

The results dir will be created under 2D_AutoJ2DGraphics and there will be a HTML report file inside that.