125133 2013-12-02 22:43:20 -0800 [Coordinated Graphics] An element with background-size:cover is drawn incorrectly under certain condition. 2014-11-18 14:09:43 -0800 1 1 1 Unclassified WebKit Layout and Rendering 528+ (Nightly build) PC Linux NEW http://black.company100.com/test/background-size-cover/ P2 Normal --- 1 jjgjoojis webkit-unassigned dtrebbien jaepark nick.diego noam yoon oldest_to_newest 955778 0 jjgjoojis 2013-12-02 22:43:20 -0800 It is appeared in EFL. I checked at r159833. Test: http://black.company100.com/test/background-size-cover/ The color of rightmost pixel is expected to be cyan. Google Chrome 27 works correctly. EFL MiniBrowser displays black pixel at rightmost. I found 2 reappearance conditions. The gap is appeared if at least one of the conditions is true. 1. Set position style of the element to fixed { position: fixed; } 2. Make the element an AC layer. { -webkit-transform: translateZ(0); } The above test applies 2nd condition only. ( position: absolute, -webkit-transform: translateZ(0). )