You're welcome ... Installing Mint-17 would solve the problem. And it is probably the best solution. I don't know whether it is possible (or safe) to update Mate in Mint-15 using apt-get. Perhaps someone more knowledgable than me might comment on that.
Of course Mint-15 still works, apart from the glitch you have found. If you want to stay on Mint 15 for now, here are some other suggestions that might solve your problem:
- Turn off compositing, as mentioned already OR
- Switch from Mate to Cinnamon: install "Cinnamon" from "Software Manager" and select it at the login screen using the "session" option. OR
- Change the Window Manager ... "compton" and "compiz" were mentioned in the other thread. I've never used Compton so cannot comment. Compiz has always worked OK for me. However, I can't check that these solve the problem because I'm using 17. (If you don't know how to change Window Manager, I can point to you to a quick guide: it is very quick and easy). OR
- Never ever type "Ctrl-P" in LibreOffice
Good luck !
