The screen has what appears to be a crack across it, yet there is no sign of any damage on the case whatsoever.
I am on holiday so it shouldn't really matter but it's moments like this that one has to admit one's addiction. Hopefully it's a warranty issue but how long that will take is anyone's guess. Looks like I'm back to one of our spare 6230's for a while :-(.
Just in case, I did find this useful link http://www.somelifeblog.com/2007/03/blackberry-how-to-replace-broken-lcd.html. I hope it doesn't come to that!