Some layers has black artifacts.
Load http://designlovr.com/examples/dynamic_stack_of_index_cards/ and hover any card. You can see strange black artifacts.
It cannot be reproduced on QT WK2.
Closing this bug because the EFL port has been removed from trunk.
If you feel this bug applies to a different upstream WebKit port and was closed in error, please either update the title and reopen the bug, or leave a comment to request this.