They go to white, some areas of the HUD

[escueto]

We recently purchased a MacPro, I think 2006, with ATI 1900, Catalyst 4.40 m329
The Snow Leopard 10.6.6 operating system has been installed at 0.

E Cueto

[RyWolf]

I have been having the same issue on my only ATI box too.. Mixes 1-4 seem fine its when I go to 5+ that it goes white on the hud. using layers 1 or 2 doesn't trigger it, Just 3+.
If the mixes are flat constant aspect ratio the whiteout does not occur.
Also turing a mix on on screen 1 will fix the whiteout.

[sam-hunt]

I too have had this. However, I believe I have found a fix.

At the very bottom of the mix window of any/all mixes using keystone, if you turn the "Offscreen" option to "on", it should fix this. It has fixed it when I've had it happen.

Support PDF, settings, and photo of the bug attached. I have only been able to reliably reproduce this on one Mac Pro - my Macbook Pro is fine.