I was involved in a similar discussion and the logic was hilarious. "Browser standards change too often." (!?) "So we're only to support an old buggy implementa

I was involved in a similar discussion and the logic was hilarious. "Browser standards change too often." (!?) "So we're only to support an old buggy implementation of the specs that is sorta emulated in one modern browser." They sounded like they were afraid of having their security blanket ripped away. If you still have some IE5 stuff, my guess is that you have to bring it up to the HTML5 table layout zone. And then you need to back polyfill a bunch of stuff to deal with the "IE7 mode" requirement.