Thanks to Tim for tracking down the problem... at least if it pops up again, we'll know where to look first now.

As for the folder inconsistencies, that's something we've experienced with UBB for a long time. The best way to ensure the folders work properly is to not use your browser's back/forward buttons, but to rely on the internal navigation provided at the top and bottom of each thread. Those links have code built in to (hopefully) interact with your FlyerTalk cookie better.