That's not strictly new in this version. I've had that enabled (hesitate to say been using) for a while now.

Anyone know if the hanging between wifi to cable connections is resolved yet? Aside from that I'm much quicker and more productive with my inboxes now. Sidebar patch, hotkey per mailbox... Very quick icedove replacement.

PS: Workaround for the connection thing is to ctrl-z when it hangs, and fg the other instance for that connection.