Happy 2011 Everyone!
Sorry for the problems that some are experiencing using the Forum. Thanks to those who wrote to tell us about the issue.
I suspect that the problem is caused by a bug in the forum software, related to the new year. Unfortunately, I'm travelling right now, and my developers are away for the weekend. However, I will have the problem checked into asap ... Monday, I expect. Sorry for the bother. Until the problem is corrected, you may need to type in your username and password when you post.
With best wishes for 2011!