Its a IE thing, works ok in Firefox. I've had to post using Firefox for a couple of days.
Its a weird one, there's no java in the page thats causing the bug that I can see, but the address in the form post tag is not right I think...
ACTION="comments/2009/11/2/63755/8969post#here"
the double "
/" before "post" could be triggering a security flag in IE, stopping the form posting.
Just a guess.
Glenn