Hotmail is not friends with Firefox 3

Since yesterday’s release of Firefox 3 I have been enjoying snappier speeds browsing  some of my favourite websites.  Not Windows Live Mail though.  When I log in it tells me this:

You are temporarily on the classic version of Windows Live Hotmail due to an error encountered during login. Before trying again, please clear your cache and cookies.

Reminds me of earlier times, when Windows Live Mail didn’t fully support FF.  What gives?

Update: A lot of people are finding this post when searching for things like “firefox 3 hotmail not working,” so it seems that this is a fairly common problem.  If anyone finds a solution, drop me a line at john at johnbeales dot com and let me know how it works, or post it in the comments, (comments are moderated so it may not appear right away).