I downloaded Public Beta 1 and all my imessages are sending from email. If I go into imessage and unselect my email from "Send & Receive" it completely signs me out of iMessage... anyone experience this or have a solution?
Had the same issue. Like others have said a reboot should fix it for you. I'd hope apple is aware of it by now but it couldn't hurt to submit it in the feedback app also. Thats an annoying bug.