Weird shadows under icons

Hi, yesterday I flashed my P7000 to official rom update with OTA support, next I installed every update via OTA and finally rooted my phone. Now I have problem - under some icons there is some background - like on screenshots. Facebook messenger in notification bar also sometimes have white background. I don't know if this is some trouble with official rom or what?

screenshots: (delete blank spaces - I can't post links, because I don't have 10 posts)
i.imgur. com/ g8qpnSt. png
i.imgur. com/ G568NRj. jpg