I was using it years ago, under 4.3. I made a DVD backup of my source code on it, and subsequently tried to read it under v6. It always caused kernel panics.

I finally ended up doing a virtualbox install of XP and putting 4.3 on that (as I had an exe backup just in case I needed it) – and I was able to get my data back.

I would not suggest using truecrypt for anything that you expect to be able to recover more than a few years in the future – it is stable, but not /that/ stable.

Just rot13 your backups twice.