This is a not all of the time problem it has only happened once yesterday and once today. I can work around it by closing the badly drawing window and then clicking the reply button again. It basically only shows the title of the window and then a huge empty white area for the rest of the send mail window.
Alexander, please tell us what Build ID you're using and provide precise steps to reproduce the problem.
I'm using build 2002042303. Steps to get the bug. I look at a mail message. I click on the reply button in the mail message. The window is not drawn correctly. to fix it. I close the window. I click reply again and everything is fine.
Alexander, please attach a screenshot of the problem. Also, please test using a new Mozilla user profile. You can test this and your other bug at the same time.
No response from reporter for 4 months. Resolving WFM.
marking verified worksforme