Every time I go to press enter to space a post instead of taking my message down a line it takes me to the chat box. It's extremely inconvenient when trying to send a pretty decent sized message to someone and it's better read if it's spaced.
I don't know if i'm the only one experiencing this, but I just wanted to bring attention to it. I've already sent a bug report in about it, but I thought making it publicly wide known would get it fixed faster? maybe? lol.
This happens to me as well, as you've described. I don't send mail that often, so I never noticed it before.
As a temporary workaround, you could rebind the chat button to another key, couldn't you? Something like tilde (~).