Weird behaviour with the crop or straighten tool in PS6

[Eric Kellerman]

OK, with thanks to people on the Adobe Forum and our very own Artobest, I think the problem lies with the checking of the 'Use Graphics Processor' in Preferences>Performance. If UGP is checked, and then when the Crop tool is used, 'Delete Cropped Pixels' is NOT selected, rotation with the Crop tool leads to the patterning. If UGP is not selected, and PS6 then restarted, it does not matter whether 'Delete Cropped Pixels' is selected or not.

I would be very grateful if people so far unaffected by this problem and still following this thread would attempt replication under these conditions.

[Eric Kellerman]

The discussion on the Adobe forum is ongoing and evermore fascinating. Frankly, it's now too technical for me.

[artobest]

Frankly, it's now too technical for me.

+1!

[Eric Kellerman]

But at least we have the ear of a senior Adobe engineer ...

[Eric Kellerman]

But at least we have the ear of a senior Adobe engineer ...

... Chris Cox, who writes: "This topic is talking about a major problem that makes low bit errors visible on some GPUs when they should not be visible.
We need to get a reproducable case of this so we can figure out where the bug is (in Photoshop, in the driver, etc.) and get it fixed."