I'm really not sure of this, but it looks like the manual wants www.facebook.com as an entry.
facebook.com should also match www.facebook.com
facebook should match anything with facebook in the url
Well I was right...I didn't know. ;-)
Thanks for your replies..
I have tried facebook.com , www.facebook.com, and *facebook* . None of them work.
I have also upgraded to 4.0.6, still no joy.
The McAfee UTM is such a comprehensively featured unit ... yet something as basic as URL blocking just isn't working for me!
It looks like you will need assitance from Technical Support.
Are you able to contact them ?
Ok, I have sussed out the problem ... was quite simple in the end!
Under "Web Cache" -> "Advanced" -> "Advanced" the option "Interoperate with Access Controls" was not enabled. Enabling that made it all work as expected!
Thanks everyone for trying to help, it is appreciated.