Just tried to reply to a message and experienced some odd behaviour.

I clicked reply, typed a message the hit preview.

I then clicked the back button and the previous page didn't have my reply (it reverted back to the original text). This must be new, because it's never happened before.

I had also clicked reply, typed some stuff, then hit back twice to see another message, then forward twice (back to the reply I was typing) and all my changes where gone, it was showing the original text from hitting reply.

I also clicked reply, typed some text and then back again (just to see what would happen) and I got a "This page has expired" in the lower pane and was asked to click refresh to see the page, which I did and I messages in the upper pane (like I clicked the new messages button).

This is kinda of a problem because, you read a message, remeber there is a FAQ, or message, or whatever that applies. So you search for the message and click to display it. Then hit the message and reply, then click back to get to the whatever, and sometimes to copy all the info you need, you have to go back and forth between the two. The way it works now makes it impossible to do that.