Bug in new Email interface?

Bug in new Email interface?

I like the new interface (only last week I was asking to be able to see if there was mail in all my accounts at the same time!) but there seems to be a bug. Whenever I post a message, the email is sent, but it doesn't disappear fromt the interface. It just sits there as though it's not been sent, and I can't activate any of the other tabs (such as Unread), nor does it disappear when I click the X on the corner of its tab. The only way of getting rid of it is by refreshing the page. This is in Firefox 3.6.3 in XP. Anyone else seeing this problem or is there something wrong with my setup?