Time zone and form posting dates/time

Although I have correctly set the time zone as +0 ( ie GMT ) in my account settings, all forum posts still appear to display with a -6 time zone offset;. I have tried loggin out and back in to see if that made a difference … It did’n’t.

Is there any other setting that I need to set to make forum posts display in my local time?

Does anyone else also have this problem?