Request for owners of new MacPro's with ATI HD 2600 XT -- error msg

I previously posted about this a couple of days ago, but now I have a simple test I'd like others to try.

Please try this test if you have a 2008 Mac Pro with the stock ATI HD 2600 XT graphics card, are running Leopard (preferably 10.5.2) and FCP 6.0.2:

Create a new sequence set to 1920x1080 (HDTV 1080i 16x9), square pixels, 23.98 fps, uncompressed 10 bit. Be sure to set the render settings to 10-bit under video processing (this is critical). Drop a clip with the same specs (10-bit, 1920x1080 uncompressed HD 23.98 -- ProRes clips should also work -- standard def files, i.e. DV clips, will NOT exhibit this issue). Now apply a "Glow" effects filter to the clip from the drop down menu (any filter should work - Bloom, Dazzle, Light Rays, etc.).

I am getting the error message: "The effect 'Bloom' cannot be rendered in a sequence of this size with the current graphics card."

Can anyone else repeat this error? Or is there someone else out there with the same specs but different graphics card who can chime in?

Many thanks,

Andrew Huebscher
Los Angeles, CA


[Contrary to my previous post, Apple tech support did not resolve this. It is not an issue of upgrading from a previous FCP project. I ended the call with the rep before I realized the project had been set to 8-bit, which is why I wasn't seeing the issue. Next time I have a free hour+ during 9-6pm I will call back.]