I have my left key set to camera and the right set to new msg.

I was using them fine this morning, but now they have just stopped working. When I press them nothing happens at all. They work fine in all the other phone menus but not from the main sreen.

Does anybody know what has happened?

A bug. Try restarting the phone.

Yeah resetting sorted it but while they didn't work I had a call and I could answer it 'cos the buttons wouldn't work.