[Webkit-unassigned] [Bug 8909] New: Vertical scrollbar appears to detach during horizontal scrolling

[bugzilla-daemon at opendarwin.org]

http://bugzilla.opendarwin.org/show_bug.cgi?id=8909

           Summary: Vertical scrollbar appears to detach during horizontal
                    scrolling
           Product: WebKit
           Version: 420+ (nightly)
          Platform: Macintosh
               URL: http://www.zone-h.org/defacements/mirror/id=3680404/
        OS/Version: Mac OS X 10.4
            Status: NEW
          Keywords: NeedsReduction
          Severity: normal
          Priority: P2
         Component: Layout and Rendering
        AssignedTo: webkit-unassigned at opendarwin.org
        ReportedBy: ddkilzer at kilzer.net


Summary: 

When a particular page loads, a vertical scrollbar is drawn and then later not
needed, but it is never "undrawn" later (unless the window is resized or Safari
is hidden and unhidden).  When the horizontal scrollbar is used, it appears to
detach the vertical scrollbar that is no longer used.

Steps to Reproduce: 

1. Open Safari.
2. Load this URL:  http://www.zone-h.org/defacements/mirror/id=3680404/
3. If the vertical scrollbar is usable, click the "Reload" button once.

Expected Results: 

The vertical scrollbar should disappear after it is no longer being used.

Actual Results: 

The vertical scrollbar does not disappear after it is no longer being used.

Regression: 

This occurs in a local nightly build based on Subversion revision r14360.

It also occurs in Mac OS X 10.4.6 (Build 8I127) with Safari 2.0.3 (417.9.3).

Notes: 

This is bug is very timing-based during the page load.  Currently, about half
of the page loads from the original web site cause this problem.


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