After upgrading to 60.3.3 I'm having quite a lot of problems. I have Thunderbird running on a Win 2008 server to which I login from different computers. Each of them having different screen sizes. The change of screen size causes e-mail composing windows to end up out of sight. Also some functions like the menu (the one that shows up when right clicking on an e-mail in the e-mail list) is not working. I've never experienced this before and I've been running Thunderbird for many years. Please help! To resolve the situation I have to shut down and restart Thunderbird every time I login from a new computer. Very disturbing.