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I've tried to find the reason for this difference. Render tree during removing '.somespace' div from screen lacks one anonymous RenderBox, which is present during layouting the div back to screen (as RenderButton parent). Processing this RenderBox in RenderBox.cpp:2233 (computeRectForRepaint(...) - "topLeft.move(locationOffset);") adds mentioned offset.

This anonymous RenderBox is removed from the render tree in RenderBlock.cpp:752 (removeChild(...) - "collapseAnonymousBoxChild(*this, downcast<RenderBlock>(child));") earlier in repainting, during processing '.somespace' div's rendertree node. There is a test, which decides whether it is safe to collapseAnonymousBoxChild, but it evaluates to true.

If I skip the call to collapseAnonymousBoxChild in a debugger, the button is cleared correctly.


'NEW' button is cleared correctly on Firefox and Chromium.

Tested on WebKit MiniBrowserEFL &#64;r189566 on Linux.</pre>
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