You cannot use Bleach or Stained Glass transparency in an animation, csehz. Xara uses all the Shockwave rules and limitations for animation as I listed on Xara Xone. So regardless of whether your output is to SWF or AVI, you still need to be careful when using transparency. ONLY "Mix", regular transparency mode is allowed in animation, and that's why you got the messed-up bitmap.

Your animation looks TERRIFIC, by the way! Great stuff!

-g