[Hampshire] VNC

Hi all

A slightly odd one this... I quite often VNC from a XP machine into an
Ubuntu machine and it has been working fine. However in the last couple of
days, when I bring up the screen, I get the Ubuntu screensaver - no surprise
there - but when I move the mouse or hit a key - the screensaver doesn't
disappear and I can do nothing with it (other than close and ssh instead).

Any ideas why it's not responding? [I'm past the password stage - it's
logging in ok]

Cheers
Rob