We've just updated the URLs in the support forum to permalink style URLs.
So instead of links like this:
http://en.forums.wordpress.com/forum.php?id=1
http://en.forums.wordpress.com/topic.php?id=20000
They look like this:
http://en.forums.wordpress.com/forum/ideas
http://en.forums.wordpress.com/topic/how-to-install-plugins
Which is much nicer.
Of course the old links which are scattered around the forums will still work.
If you find anything that seems to be going wrong on the forums or anywhere in wordpress.com with links and URLs behaving badly, please report it to this thread.