[Webkit-unassigned] [Bug 113115] New: [Chromium] Filter effect bug when scrolling page behind fixed element

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=113115

           Summary: [Chromium] Filter effect bug when scrolling page
                    behind fixed element
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: Unspecified
        OS/Version: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: CSS
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: dmazzoni at google.com


Created an attachment (id=194654)
 --> (https://bugs.webkit.org/attachment.cgi?id=194654&action=review)
Repro

Major visual glitches / compositing errors when you try to scroll a page that has a fixed element floating above it, and a CSS filter effect is applied to the whole page.

Having a Flash <object> on the page seems to be a trigger, it's hard to repro without that. No idea why, would love to know more about what that's triggering and other ways I could trigger the same bug, or work around it on a page that has Flash somewhere.

Simplified repro attached. Repros in all versions of Chromium from 25 to 27, not a recent regression.

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