Default [Q] Messy Graphics

Any idea why the black color is around these stickers it also happenes with the playstore , didn't find this problem any where else , using Jelly Xperia V7 ROM , if i flash that ROM again problem solves , but i'm curious to know , what has messed up the graphics.... as i have installed loads of apps and others things , if i install the data backup of CWM , again this black thingie comes.. -_- , help really appreciated
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