[Webkit-unassigned] [Bug 57076] New: <div> within an overflow:hidden <div> fails to redraw when 3D CSS transform is used

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=57076

           Summary: <div> within an overflow:hidden <div> fails to redraw
                    when 3D CSS transform is used
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: Macintosh Intel
        OS/Version: Mac OS X 10.6
            Status: UNCONFIRMED
          Severity: Normal
          Priority: P2
         Component: Layout and Rendering
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: sprite+b.w.o at apple.com


Created an attachment (id=86876)
 --> (https://bugs.webkit.org/attachment.cgi?id=86876&action=review)
Reduced test case

Steps to reproduce: 

* Open the attached test case
* Click "Move layers"

Expected result:

* The words "Hello World" move upwards.

Actual result:

* The words "Hello World" does not move, until the browser is forced to repaint (e.g. resizing the browser window).

Notes:

* Reproducible on Safari 5.0.3 and WebKit (r81868) on Mac OS X 10.6.6. 
* This bug is present only when there is a <div> with 3D transform stacking below the overflow:hidden <div>.

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