Version: 128.2.3esr (64-bit) on Windows 11 Click on an open tab (other than main inbox tab) and Thunderbird partially minimalises, showing only a small part of the thunderbird screen. Clicking on a email in the email receive list and instead of the body of the email apprearing in the view window, it opens in a new tab Highlight more than 2 or 3 messages in the email list to action them and before I can, they all open. It is impossible to select a series of emails to delete, move or tag them because after 2 or 3 they all open. Closing all the open tabs then leaves the emails highlighted and I can then perform whatever action I need, but this is strange new behavaiour. In fact all 4 issues are new. Clicking on the down arrow on the keyboard does not always move the cursor to the next email in the list. Can anyone suggest a solution please? Michael