Object Transitions problem

I am creating and destroying objects, which no more than 10 are on the screen at a time, and intermittantly some of the object is left on the screen after being destroyed..a few stray pixels. It seems to happen if several of them are overlapping and are destroyed. I'am using the zoom transition. Anyone ever seen this before?

Could you send me your application?

Yves.

Sent,
Please let me know if you get it properly.
Thank you