Issues I got so far in Trusty
Sporadic disappearing mouse cursor.
Ubuntu not logging in automatically, it boots to unity greeter, and I have to manually login. This also happens sporadically.
Plugin indicators crash, or won't show up (gear icon, time).
Sometimes, when login out and login in, I get on my upper left corner some error messages related to Xorg.
Intel 4770k + ASUS Z87 PRO + 8GB + AMD R9 290X