Flash crash and corrupt FLA

Hey

FLASH 8 problems og Vista 64 Ultimate SP1:

Lately I’ve experienced that several of my FLA’s became corrupt.

File 1: suddenly corrupt after I tried to apply more color shades to the shapes, that are already inside some symbols, inside other symbols, that are tweened on the main timeline. When opened, no timeline is visible, and neither with working space. It’s just plain white. When Library is opened, the symbols are there, but when clicked anywhere within the Flash window, Flash crashes saying that it stopped responding.

File 2: corrupt as well, with same behaviour as File 1. Here is what I did, before it got corrupt. I have FLA file “A” open in Flash. I edited some symbols by adding more color shades, that were frame by frame animated in a symbol , that is tweened on the main timeline in another symbol. Later I open file “B” to copy the a preloader from it to “A”. Now both files are open in Flash. I export “A” as SWF, send the FLA file over MSN to my mate, upload the SWF to my webpage. When alt tabbed back to Flash it crashes and suddenly I find out that the file can’t open.

Lucky for me I have some backup, even though I’ve lost few hours of work. I name my files as Name_01, Name_02, etc.
It’s annoying, not only to lose your work, but KNOW that it can happen again, demotivating you and preventing you from going wild creatively, knowing that at some point it might happen again. I ask you to share your experiences of corrupt files and how to prevent them. Write, what you did exactly that resulted in a corrupt FLA, and what you did/didn’t do to prevent the problem from occuring.

As you see my two examples, it might look like a same pattern of; that Flash does not like, when you edit shapes or colors of your symbols, already animated and tweened inside several other symbols. And ofcourse it does not like, when another programs, like MSN start interfering with the very same file opened in Flash. BUT THAT IS ONLY MY THEORY.

Share your experience.

Thanks for your effort.

-Alex