Broken copy and paste
I'm working in 3.5 RC, and I find that oftentimes copy and paste doesn't work. It happens randomly, though, as sometimes it works, but most of the time it doesn't. For example: in bar 1, I select beats 1 and 2, copy, and successfully paste them into beats 3 and 4. Then I select the whole measure, copy, select bar 2, paste, and nothing happens. Sometimes I have to try five or six or more times before it works. (Just doing the same thing over and over again--not doing anything differently.) Sometimes it doesn't work at all. (And, to clarify, I'm referring to copy/paste that should work; I'm not trying to paste something where it's not able to go.) I've been trying to capture a gif of the problem, but for whatever reason, whenever I do, the copy and paste works fine.