Using Flash to export mov/quicktime video shows ghost images

I am trying to export a flash animation as a mov, so i can convert it for html5. When I export the movie, the animation has artifacts in it, strange things do not erase correctly, they do not show when i view it in Flash, or when I view the exported flv file.

enter image description here

So as you can see, there is a 1/2 drawn image. They round things are floating down, but for some reason, as they float down to stack, they leave behind some partial images.

Has anyone seen and solved this before?

settings:

enter image description here

Solution

I know it's an old question, but the solution (sometimes it's annoying) is to set the project frame rate to 30fps.

So, a tip, always start your projects with 30 fps.