Thanks for your help Carolyn
Did what you requested:
First time I opened communities nothing happened but when I tried again it started giving the same message. Posted a new print screen
http://www.flickr.com/photos/13924946@N05/4890084605/
Do you think I have a virus on my Mac?, this just happens on the Apple site/communities with Safari. Tried with another browser and all is well.
(I have 10.6.4 installed, the first time i posted forgot to put the correct version)