I can't say I have many problems with time zones except on SRP.
I always log on in the mornings to find that all questions have been answered, all razors sold and all I can do is look at the mess eft after the party!
I'm going to have to start staying up at night I think!
Seriously though, does anybody have any issues with time zones. I only have to change an hour when I go back to the UK so it isn't really a problem.