It does some weird things in full screen, especially if you have multiple windows going. I've closed one window, but the save dialog pops up on another... but when I swipe over, that dialog goes away, and the modal that I can't click on blocks the rest of the UI. Nothing but a force kill can resolve it. I've been using it 4-12 hours a day for several months, so I'm rooting for it, but losing work will always trump whatever OSS cred it has.