[Webkit-unassigned] [Bug 98579] New: REGRESSION (r128735-r128804): Fixed position div causes other elements to not update correctly

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=98579

           Summary: REGRESSION (r128735-r128804): Fixed position div
                    causes other elements to not update correctly
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: Macintosh Intel
               URL: http://development.rhubarbproductions.com/webkit/updat
                    e/
        OS/Version: Mac OS X 10.8
            Status: UNCONFIRMED
          Severity: Normal
          Priority: P1
         Component: WebCore Misc.
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: kevin at rhubarbproductions.com


This test link is reduced from a wordpress admin page where it places an admin bar with a position: fixed; on it.

Load the test page. Scroll the Shortcodes list. About 25% down it stops updating, but if you roll your arrow over the content, that triggers and rendering update. Scroll it back to the top and it starts updating normally again.

Removing the position: fixed; from the top div with Web Inspector causes the glitch to not occur.

Likely related to Bug 98578

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