col and colgroup elements are ignored if there is a caption element preceding them in the table. See the testcase for an example.
Created attachment 4793 [details] testcase
Created attachment 4794 [details] Skip the caption when looking for col
Comment on attachment 4794 [details] Skip the caption when looking for col r=me
Suggestions as to where to put the testcase are always helpful :) Patches including the test case are even nicer. :)
*** Bug 7930 has been marked as a duplicate of this bug. ***