Well, I just got back from work, played it for an hour and half to see how it was, and it played fine. No freeze or corruption. Then, in between saves, I needed to go out for some take away, so paused the game, and when I got back, it had frozen. It was only on the pause screen!?!?!?
The corruption hasn't occured since. I've hired super monkey ball, so i'll give that and eternal darkness a whirl tonight and see how they go. I've got to get this sorted before I pick up Zelda on friday!!!!!
The only time i've seen anything like this before, is on my PC. I'd overclocked the gpu too much, and it went mad. That was probably down to heat, and the GC has got about 3 foot clear either side. And it's brand new so that HSF isn't full of belly fluff.
Thnx for the replies.