User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.5b) Gecko/20030813 Build Identifier: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.5b) Gecko/20030813 Starting to type a second address in mail composition, and then changing your mind and backspacing away that second address field will cause the address and subject areas to be unselectable and "hung". Reproducible: Always Steps to Reproduce: 1. Open a composition window 2. Type one address and hit enter to go to the next spot 3. Hit backspace to delete the To: field. Actual Results: You can't select or input anything further in the address or subject lines. Clicking repeatedly doesn't help. Tabbing to the body text area and then reverse-tabbing back to the addresses seems to work. Expected Results: Simply delete the second To: field and return to the first one. Non-HTML composition (don't know if that matters).
This was fixed somewhere along the line. Don't remember exactly when... but it's no longer a problem.