[Webkit-unassigned] [Bug 57123] New: Background Color Flashes as Small Box in Upper Left When Content is Scrollable

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=57123

           Summary: Background Color Flashes as Small Box in Upper Left
                    When Content is Scrollable
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: Macintosh Intel
               URL: http://www.mikehemesath.com/box_bug/index.html
        OS/Version: Mac OS X 10.6
            Status: UNCONFIRMED
          Severity: Normal
          Priority: P2
         Component: Layout and Rendering
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: mike.hemesath at gmail.com


When the background color of the body is different than the html document, the bodies background color may bleed through as a flash in the upper left hand corner when the document is rendering. 

To Reproduce:
#1 Visit the Urls on the Page Below
#2 Ensure the Window is sized such that a vertical scrollbar will appear
#3 Refresh the page looking for a small roughly 10x10px box in the upper left that bleeds through. The box color should match the body background color.

Other Info:
Doesn't seem to happen if web inspector is open.
Doesn't seem to happen unless the background colors are specified in an external stylesheet.

Reduced Test Case:
http://www.mikehemesath.com/box_bug/index.html

Other Websites That show the issue:
http://dribbble.com
http://www.agencieshq.com

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