Reid,
> the subject of audio or media (including video) file corruption <
Wow, what a great subject.
I use Sonar and I never have a problem with corruption. Sonar has an option to bundle up all the files and project settings into a single file. But I use that for backup only, in conjunction with a normal "save" that keeps all Wave files separate. In case of total disaster I can still piece a project together again from the source Wave files. Fortunately, that's never happened!
Here's more advice: Always back up to at least two separate physical drives, and always alternate the backups. That is, back up to Drive 1 today, then next time back up to Drive 2, then to Drive 1 again. If something corrupts the original project while saving and you copy that corrupted project over your only backup, you'll have a rude surprise the next time you open the project and find it and the backup are both hosed. If you alternate backups, even if your current project and backup are hosed, you still have a recent backup from last time.
I take this paranoia one step further. After I save a project (not just audio, but Word docs and everything else) I open it again to prove it was not corrupted while saving. That's when corruption problems usually happen. Once I know the file can be opened, then I copy it to the next alternating backup in sequence.
There's a famous computer saying: "Unless your data exists in at least three places, it doesn't exist at all."
--Ethan