[Webkit-unassigned] [Bug 151409] New: tranform(3d)+transition in elements cause fixed elements to move

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=151409

            Bug ID: 151409
           Summary: tranform(3d)+transition in elements cause fixed
                    elements to move
    Classification: Unclassified
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: PC
                OS: Windows 7
            Status: NEW
          Severity: Minor
          Priority: P2
         Component: CSS
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: laltronereo at yahoo.it

Steps to reproduce the problem:
1. create element which rotateY(#deg) every N seconds with transition (javascript timeout)
2. add a fixed element (outside the first element - not related to it) and apply a rotateY(#deg).
3. add any text and link to the html

What is the expected behavior?
fixed element should not move.
text should not be repainted

What went wrong?
the fixed element slighty move by 1-3px.
sometimes doesn't happen
sometime text became blurred when transition is occuring, like the whole document is being transformed

Did this work before? N/A 

Chrome version: 46.0.2490.86  Channel: stable
OS: Windows 7

you can see a live example at www.rocchetto.it: (the red dot at the bottom right is a fixed element, the gallery have 3d animation)

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