Thanks for your replies. It has been about 3 days since the buzz trophies disappeared and they still have not come back. My Uncharted and SSHD trophies are still there. I have earned extra trophies in Uncharted since and synchronised and they show up. I did replace my hard drive last week but I am sure the buzz trophies were there immediately after this.

It's all a bit strange.

My trophies achieved in Buzz have vanished from my trophy collection, however they still appear on my gamercard/profile so my PS3 knows I have been awarded them.

Has anybody else encountered this problem and if so how can I get them back?

any help appreciated.

Hello my ID: Benson_75