[jurg]

Can you please open your Zimbra with ?dev=1 like:
Code:
https://wwww.yourZimbraServer.com/zimbra?dev=1
and then paste the error?
This would reveal what shows C A+ D+ etc are.

I'm afraid there is no error there. Actually, I can't find any message relating to zimlets. And the social tab doesn't show of course.