Active objects losing their animation data?

At some point while I was working on my game in MMF2, I noticed that several of my objects had lost their graphic data for no apparant reason:

http://img855.imageshack.us/img855/6658/glitch1j.jpg

Notice how the Badnik_SporeProjectile object has no icon.

http://img190.imageshack.us/img190/9163/glitch2q.jpg

When editing the object's animations, every frame has been replaced with a blank white canvas. This is in spite of the fact that I changed the canvas color to teal.

I have tried closing MMF2 and opening it again, but the problem persists. When I try to run the frame, the affected objects take on the graphics of other objects in the frame.

If I had to guess, perhaps some kind of memory leak is to blame. I'm using build R254, but I'm unsure if it's related to this specific build - hence why I made a new thread for it instead of posting in the 254 thread.

I have a recent backup of my game where the objects are still intact, so I can simply replace them, but I'd like to know if there's any way I can minimize the risk of it happening again.

Hmm interesting
Perhaps you could send the bad file over to Yves for evaluation on what happened.

The bad file no longer exists, since I replaced all the affected objects. I'll keep that in mind for the next time it happens, though.