Created attachment 537310 [details] List of failing tests The failures roughly fall into these groups (1) 621253-1-externalFilter is timing out doing REFTEST INFO | Updating canvas for invalidation REFTEST INFO | DoDrawWindow 0,0,800,1000 REFTEST INFO | [CONTENT] MakeProgress: STATE_WAITING_TO_FINISH REFTEST INFO | [CONTENT] MakeProgress: waiting for MozAfterPaint REFTEST INFO | [CONTENT] AfterPaintListener in http://localhost:4444/1307161617192/2/bugs/621253-1-externalFilter.html This looks like a pretty bad legitimate bug. Maybe in the harness. (2) test or reference is blurry, as if it's being resampled. Seems to be occurring with zoom tests. (3) test has a thin gray line around window bounds. Looks like a slight mispositioning, or bad snap. (4) antialiasing microscopically different for test/ref. Might be another instance of slight mispositioning, but some of the tests look like grayscale vs. subpixel AA.
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