[Webkit-unassigned] [Bug 37264] New: [Qt] "planet" css animation is not fixed to the top of the viewport when tile backing store is enabled

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=37264

           Summary: [Qt] "planet" css animation is not fixed to the top of
                    the viewport when tile backing store is enabled
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: All
        OS/Version: All
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: New Bugs
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: zherczeg at webkit.org
                CC: koivisto at iki.fi, hausmann at webkit.org


Open this page: www.sc2armory.com

There is a nice planet in the background, which is fixed to the top of the
viewport, regardless of scrolling. This is working with QtLauncher as well.
However, if the tile backing store is enabled, the planet can be scrolled out.
I think the following css rule cause the problem:

protoss.css: 

#planet { 
 background: url("/img/themes/protoss/planet.jpg") top center no-repeat;
 background-attachment: fixed; }

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