Hello Simon,Your machine seems to be behaving oddly. Perhaps it would be a good idea to zap the PRAM. To do this, shut down your computer, then hold down the Command, Option, P and R keys and press the power key. Keep the four keys held down until you've heard the chime three times, then let them go and your machine will boot normally.
After that, do Repair Disk Permissions. I can't promise that this will help, but it's worth a try.
Cheers, Anne
