Today I decided to upgrade from 6.0.6 to 6.0.8.
Everything went fine until I installed the small 23Mb patch that came out a week ago.
I did ./installPatch.sh as root as instructed and it seemed top copy the 5 new files fine. I then did 'su - zimbra' and 'zmcontrol restart'
I now have red X's under all services except stats (everything was blue ticks until I applied the small patch).
Otherwise server has been working perfectly up until now.
Any ideas what this could be? It does seem that people can send mail at least at the moment.