[Webkit-unassigned] [Bug 116319] New: webkit-backface-visibility on a parent element stops background-position from updating

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=116319

           Summary: webkit-backface-visibility on a parent element stops
                    background-position from updating
           Product: WebKit
           Version: 525.x (Safari 3.2)
          Platform: Macintosh Intel
               URL: http://jsfiddle.net/nathanstitt/JcX4g/3/
        OS/Version: Mac OS X 10.8
            Status: UNCONFIRMED
          Severity: Normal
          Priority: P2
         Component: Layout and Rendering
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: nathan at stitt.org


If a parent element in the DOM has -webkit-backface-visibility: none applied,  it's children no longer re-render when their background-position is updated.

http://jsfiddle.net/nathanstitt/JcX4g/3/ will illustrate the issue.   Observe how the magnifier image shows the high-resolution image when it's moved.  Uncommenting line 3 ( webkit-backface-visibility) and re-rerunning the jsfiddle and the image never redraws, even though the attributes in the DOM are updated.

I encountered this when using the flexslider library (http://flexslider.woothemes.com/), which applies the backface-visibility.

Hope this helps, contact me if you need any further details.

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