Created attachment 204139 [details]
See attached testcase: the text should be green.
This works right in Safari 6.
Looks like this is not the right attachment.
Created attachment 204179 [details]
Regression range is 121512-121566, and <http://trac.webkit.org/r121551> is the only suspicious change there.
Boris, is this known to affect live content?
I ran across it in a stackoverflow question that was asking about the different behavior in different browsers. Past that, I don't know.
The attached test case works as expected.