Anti-aliasing with CS5 and Blackmagic Multibridge Pro

Question

To anyone else using a Blackmagic Multibridge Pro card:
I am experiencing bad aliasing on scaled video in a Blackmagic Adobe  Premiere timeline.
With Adobe Premiere's GPU acceleration turned on, scaled video looks  great, but the GPU setting introuces too many other bugs to be reliable  (unpredictable cross dissolves, alpha channel misinterpretation, etc.).
When I turn GPU acceleration off, cross dissolves and titles act as they  should, but scaled and time-altered video looks quite bad.
I'm working in Blackmagic native timelines (pick any--it's the same for  all) and have Adobe Premiere's Preview File Format set to "Uncompressed  10-bit YUV" with "Maximum Bit Depth" and "Maximum Render Quality"  checked... but the effected video still looks aliased.   Anyone else out there with this configuration having the same issue?
Best,
James
Windows Vista Ultimate 64-bit SP2
16GB RAM
24GHz Intel Xeon (dual quad-core E5450 @ 3GHz)
CalDigit 2TB Raid
NVIDIA Quadro CX v258.49
Blackmagic Multibridge Pro v7.7.2
Premiere Pro CS5 v5.0.1

Answer 1

Thanks for the heads-up on Adobe's update, Todd.  I have installed 5.0.3 and it has solved many of the undesirable GPU-related issues.  I am now satisfied with the way GPU acceleration handles cross dissolves and alpha channels.  I feel like I'm now moving in the right direction, working with GPU-acceleration enabled for all projects.
That said, and in confirmation of my previous post, the only remaining issue seems to lie with how Blacmagic-native timelines interpret renders and preview files differently between a project with GPU acceleration enabled versus disabled.  Take, for example my previous list of renders from a Blackmagic-native timeline...
Render 1:  Mercury Playback Engine Software Only + "use previews" checked
Render 2:  Mercury Playback Engine Software Only + "use previews" unchecked
Render 3:  Mercury Playback Engine GPU Acceleration + "use previews" checked
Render 4:  Mercury Playback Engine GPU Acceleration + "use previews"  unchecked
With the 5.0.3 update, renders 3 and 4 are still the same as each other (no change here), but now all transitions and alpha composites look as expected (fixed!). Next up, renders 1 and 2 are now also the same as each other (fixed! A predictable result, unlike in v5.0.2).  The video is still aliased as before--but the fact that these two renders are now the same helps pinpoint the aliasing issue to Blackmagic's handling of GPU disabled renders.
In short, the Adobe Premiere update 5.0.3 addresses and corrects all known GPU-related rendering issues within Premiere-native timelines.  And, because of this, any distinction seen between "GPU Acceleration" and "Software Only" renders from a Blackmagic-native timeline have been reduced to a mere curiosity.
My thanks to Adobe and everyone who posted here to help solve such a convoluted issue!
Best,
James