Thunderbird is misbehaving egregiously this morning which is something it seems to regularly do. Today it is once again doing this: * going through email, I click on a message which marks it read and then I move it to a folder * do this with 10 or 15 emails * then suddenly all of the recently read & moved emails reappear back in the inbox unread * after a few minutes, the messages, without any input from me, start to SLOOOOWLY, one by one, mark themselves read and disappear from the inbox, which can take several minutes * if I check the folder where I moved a message, it's still there even when it appears back in the inbox, if I click on the message in the inbox & move it to the folder again (which can only be done sometimes), I then have two copies of the message in the folder Also, sometimes the email message view won't change. I click on a message & it shows in the view pane, then I click on a different message in the inbox & the previous message is still in the view pane, fully functional, scrollable, etc. I have killed & restarted Thunderbird many times this morning and these behaviors still keep occurring. Also also, why does Thunderbird hog my CPU cycles? Sometimes, for extended periods, it will be using ~50% of my CPU when I not even working in Thunderbird, & I know it's not compacting because I've told it not to. In spite of knowing about issues for a long time (some of which I, and others, have previously reported), the Thunderbird team seems incapable or unwilling to fix these problems. What's really frustrating is that Thunderbird didn't used to have these issues, they only appeared after an "upgrade" which occurred about five months ago.