I'm going to be doing a software upgrade this coming Saturday morning, so the Forum will be down for about 3-4 hours starting about 06:00 CDT or 11:00 GMT.

There aren't any huge functionality differences between the new & old versions, so this should be a fairly transparent upgrade--mostly we're interested in some security enhancements.

See this thread on vbulletin.com for the enhancements list:

Thanks