ACID has always been about testing obscure edge cases and weird parts of the HTML spec, and sometimes the way that the spec was written in the past differed fro

ACID has always been about testing obscure edge cases and weird parts of the HTML spec, and sometimes the way that the spec was written in the past differed from "in-the-wild" behavior. These days, in the post-W3C era, the HTML specs try hard to capture behavior as seen in-the-wild. Basically, ACID doesn't test the modern spec. See, for one example: http://www.howtocreate.co.uk/SGMLComments.html#simple http://www.howtocreate.co.uk/SGMLComments.html#simple