by the way: the cookie login system doesn't seem to be working very well, is it a slight side effect of the move?
The cookies are associated with the old domain name, not the new one so you should get a new cookie when you log in.

Edit: Automatic log-in seems to work once you log in at the new address. And BTW, if you want to use any links (like forum post links) copy them to the address bar and add a 4 after Dynamic and the link should work.

Example:
dynamic.gamespy.com/~freespace/forums/forumdisplay.php?s=&forumid=7
dynamic4.gamespy.com/~freespace/forums/forumdisplay.php?s=&forumid=7