The results look mostly correct on Chromium/Mac (modulo gamma correction), but are wrong on Linux and Win (a solid green square instead of a blue-and-white checkerboard with a green rectangle below it).
Note that this might be a timing-related problem, since test occasionally passes on Linux32.
Thanks Stpehen, dup of 82480 ?
bug 82480 ?
*** This bug has been marked as a duplicate of bug 82480 ***