What exactly do you mean by "stability"?

Newer versions of Word may be, in themselves, more stable, but this in no way alleviates problems that arise from people using Word badly. Using best practices - and of course good design - is the way to keep corporate documention clean. Unfortunately again that does not prevent people from screwing things up.

It is true that say 2010 does have a bit more control over how much users can alter existing documents.