I have one problem - when I upgraded from version 4.4.2 (06/02/2014.) to version 4.4.3 when zooming images or youtube videos in browser, a through them appear white boxes covering the entire surface. The same thing happened with the pictures in the other apps (newspapers, tapatalk etc...). After a while I returned version 4.4.2 and all was ok again. Now when I upgraded to 4.4.4 again the same problem appeared. I'm installed Opera and that solved problem only with browsing.
My phone is Huawei g510-200.
Sorry for bad English, I just couldn't find any solution for this annoying thing.