[Webkit-unassigned] [Bug 21722] New: Graphical corruption when scrolling with middle mouse button

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=21722

           Summary: Graphical corruption when scrolling with middle mouse
                    button
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: PC
        OS/Version: Windows XP
            Status: UNCONFIRMED
          Severity: Normal
          Priority: P2
         Component: Layout and Rendering
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: spam_hole at shaw.ca


Scrolling using the middle mouse button causes chunks of the page to be
replicated at the wrong places. The wrong pieces are deposited near the
pointer.

Steps to reproduce:
1) Go to any webpage that can be scrolled (horizontally, vertically or both)
2) Push the middle mouse button to invoke scrolling mode
3) Move the mouse to scroll in any direction

Result: chunks of the page are improperly duplicated, resulting in what appears
to be graphical corruption

Expected result: page renders properly as it is scrolled

This was tested on WebKit r37604 (nightly, Oct 15 2008).


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