[Webkit-unassigned] [Bug 72945] New: Background image attachment changed to fixed in JS shows repaint errors

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=72945

           Summary: Background image attachment changed to fixed in JS
                    shows repaint errors
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: Macintosh Intel
        OS/Version: Mac OS X 10.6
            Status: UNCONFIRMED
          Severity: Normal
          Priority: P2
         Component: CSS
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: ned at baldessin.fr


Created an attachment (id=116211)
 --> (https://bugs.webkit.org/attachment.cgi?id=116211&action=review)
Reduced demo of the bug

See reduced demo attached.

Steps to Reproduce:
- create div with background-image: scroll
- in JS, set backgroundAttachment: fixed on the element
- when you scroll, the display of the element is garbled or not updated.

Additional Information:
- This bug does not appear when the page is displayed inside an iframe.

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