I did not have any problems getting a new password. I did check the :log me in automatically" box, which hasn't worked yet, but that's the only problem I've encountered. I changed my password, and it stuck, so that issue doesn't seem to be affecting everybody.
I just noticed that the new forums allow you to enter a subject for each post in a thread. Unless I was less than observant, that feature wasn't there before. There will probably be a lot of blank subjects in threads until everyone gets used to this feature. I don't know if that's a problem or not. If it is, you could have it default to "re:[Thread Title]" when you click the "post reply" button, and then let people change it if they want. That may be more additional programming than you want to do right now, so I won't be hurt if I'm ignored.
Thanks for all of the work you have been doing. The changes look great.