Nope no lockscreen bug. Everything works fine. BUT: The Settings Scroll Animation is kinda laggy. Not as smooth as it was on 4.3. And when installing Apps the Tablet is also very laggy. Same on Xperia Z. But this is something i could live with. I have a sd card inserted and there are no problems like the Samsung ones.
But i have one question: How can i activate the Immersive mode? I couldīt find it in the settings. I used All-in-one Gestures to get into it. But it looks like Sony made Xperia Home and Media Apps not compatible with it.
Google: Nexus 7 (OLD)
Samsung: Galaxy S3, Galaxy Note 10.1
Lenovo: Ideapad K1
Sony: Xperia Play, Tablet P, Xperia Z, Tablet Z
LG Optimus 7 E900
Nokia: Lumia 800, Lumia 520, Lumia 925
Apple: Iphone 4, Ipad 2