Kirk,
General Photography has been fine, they are on two separate ext. hard drives. I have a suspicion the Sports hd is playing up. I'm in the process of doing another back up.
I've carried out a Mac disk utility first aid on it and it seems fine.
Something else has just started happening, in that I can't start the Mac with the Sports hd plugged in, I have to disconnect it each time.
Yeah I'll delete the default catalogue.
Thanks for your help.
Simon.