Compose windows unusable after forward

[Mike Scholes]

Sometimes, not always, when we click "forward" the text area for the message is unusable. Zimbra does not stop and you can move to other areas but you just can't type anything or delete anything in the text area containing the forwarded text. If you cancel and re-forward it's OK. The draft is also locked.

F7 5.0.1

[prasantamitra]

Also facing same problem, with IE & Firefox.