Set to continuous shooting mode and the trigger release button being stuck down?

Might not even be the button itself but something else that is related. When I first got my 400d the PC wouldnt recognise the camera when connected after a few months. Sent it off under warranty and they replaced the PCB. Youd have thought it would have been a firmware or computer issue but instead it was something hardware related that had gone wrong :|

No I havnt tried that, as I say Ive not got my hands on it yet, but Ill try that out, cheers BS

I took it to one of my photography teachers, because he said hed have a look at it for me, but when he turned the camera on, it was working normally. Because Id been out in the snow using it he thinks it might have been some dirt or water locking it up or something which was making it take the photos.
As always, you try to get someone to fix it and behaves itself (:

Thanks everyone for your help though (:

Were going to take it to a photographers in Portsmouth for a check over/proper clean just to be sure since some of the pictures come up a tad dirty. Thanks everyone