These three fail because we don't collapse border-spacing between adjacent row-groups. It's a one-line fix with a lot rebaselining attached. :{
Created attachment 161306 [details] Patch
Comment on attachment 161306 [details] Patch Attachment 161306 [details] did not pass chromium-ews (chromium-xvfb): Output: http://queues.webkit.org/results/13684706 New failing tests: tables/mozilla_expected_failures/other/test4.html
*** This bug has been marked as a duplicate of bug 20040 ***