Maybe I read it the wrong way, but by "another IE6 situation", I took the comment to mean that Firefox is the new IE6, likening Chrome's position to Firefox's at the time.

You have a lot of new stuff being designed & tested using Chrome, with some site breakage if using Firefox. Similar to several years ago when releasing sites that "work best with Firefox" (complete with badge images stating such), leaving IE6 users with a lesser experience.