Here’s one thing I’ve experienced since version 1.0 and still do in 1.1.
After a while I can’t make selections in the score. Or, I can, but they don’t display. When dragging a selection with the mouse nothing happens (no marquee) and objects won’t be visually marked when clicking them. But if I do a selection and hit delete it’ll be deleted. So what’s happening is that the screen doesn’t visually respond to the mouse.
After switching score layouts back and forth it works for a while again, until I have to do that maneuver again.