First question: You say You captured using the ATI card. Is it using Firewire, or is it through composit/s-video? If so, what kind of compression is used in the capture?

When scrubbing, Premiere applies effects and stuff to what You see, which can make the whole thing jerky, depending on what's going on (effects/...)

"I try to advance frame by frame and it only advances every 5 frames or so." This sounds a bit strange, but it may depend on where You try to advance, how You do it, and so on...

The export issue seems a bit strange, but the immediate feeling I get is that the computer don't really manage to keep up showing the video at the given resolution? I guess You play it back in Mediaplayer or similar, so unless the AVI was badly encoded from Premiere (which I think You have to change the settings to "achieve"), Premiere is not to blame for that?

Perhaps a bit more info on OS, filetypes, video resolution, and so on might help?

Regards,
Rico

Ok If you want to preview you fottage in premiere whislt you are editing you simply hit the enter button it will render the edit and this may take a while and then it should prewiew it perfectly, however there is another way you may not know of i think it depends on what version of premiere you are using, i use 6.5. Go to the project menu --> Project settings --> Keyframe And Rendering and click real time prewiew, this will show you your work in real time ...you need a pretty fast computer to run this feature but still.

If you are already doing that it may be your problem and you should run a normal prewiew that should work perfectly if not well i cant help ya ?:)?

"what if i had a mustard drenched cucumber tied to my leg"