I believe this is fixed in vBulletin 3.6.9. vBulletin has released that update, but this board has yet to be upgraded.
This error cannot be fixed on the user side as far as I know.
Edit: I just found a way around it.
http://toontowncentral.com/forums/pr...do=editoptions
add -2 (eg: GMT-6 goes to GMT-8) and save changes. Your times should be fixed now.
The time at the bottom of the forum will be wrong though. =/