How to fix serious quality issue: artifacts created by moving cursor?

I've gone through all the online responses to this issue I could Google, but suggestions about changing SWF slide quality options, and other proposed solutions, make no difference. When doing motion capture, the cursor, when transitioning from dark to light background, leaves sliver-shaped artifacts across the light background. The artifacts do not show up on F3 playback, but they can be seen in the audio edit screen (using Show SWF), and in the compiled SWF file. Changing the output quality settings makes not a whit of difference.

Because they don't appear in F3, I think there may be hope in avoiding the artifacts in the final product. I just need to know the secret, which seems to have been closely guarded through several generations of this product. I'm running 5.01.624.

I'm on the first of some 18 tutorials, so if anyone can help, I will have a happier client and a few less gray hairs.

Thanks,

John Mulvihill, SF Bay Area