Just upgrade to 7.1.5
Everything works great, new animations are neat, except: I use the pattern lockscreen. When the phone is in "clock" mode, and goes to screensaver mode, the invocation of the lock screen results in a half blank screen, half background, with none of the lock circles displayed. The phone can be unlocked by pattern if you're very careful and GUESS where the circles are, but it's very difficult.
This bug wasn't there for 7.1.3 or 7.1.4.
I disabled all animations, no joy.
I disabled the lock screen completely (no pin or pattern lock) and it appears to work OK.
Not a huge deal, but for now, I think I have to stick with 7.1.3 or 4.
Anybody else seeing this problem? Can't lock my phone anymore.