I uses Boris Red inside FCP5 - and when I have a uncompressed sequence and makes an image or logo move in a Boris effect it jitters when it moves. When I do the same effect in a DV-PAL sequence it works fine - but not in uncompressed.
What am I missing??
I've had similar issues, primarily with moving text. In your preferences, under the Local Projects tab, check the box for 1:2:1 Deflickering and see if that helps. Unfortunately, this will not remain the default setting (even though the box says that it will), so you will have to do this with each new project.