[Webkit-unassigned] [Bug 101644] New: Fixed header on Facebook news feed becomes detached from top of viewport after rubber band scrolling

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=101644

           Summary: Fixed header on Facebook news feed becomes detached
                    from top of viewport after rubber band scrolling
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: Macintosh
        OS/Version: Unspecified
            Status: NEW
          Keywords: InRadar
          Severity: Normal
          Priority: P2
         Component: Layout and Rendering
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: bdakin at apple.com


When scrolling upwards rapidly on my Facebook news feed, the blue header at the top of the page often detaches from the top of the page after my scrolling reaches the top and rubber-bands back.

This regression appeared once we started scrolling pages with fixed positioning on the scrolling thread. 

<rdar://problem/12651944>

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