These two recently-added tests are failing on the Mac:
To my eye, the tests look like they are correct, but DigitalColor Meter indicates that the colors are slightly off.
I will skip the tests for the time being.
Skipped on Mac with http://trac.webkit.org/changeset/120773
Only svg/filters/feSpecularLight-premultiplied.svg fails now due to some color difference.
svg/filters/container-with-filters.svg is still failing on Lion.