David Baron and I have been studying the TableTHRule and believe that it should be eliminated in favor of a simple center alignment rule in html.css. This will make us behave exactly the same as MacIE, but it will cause us to deviate from NS4.x and IE behavior. The code simplification that we can get from this and the fact that it is more sensical behavior anyway (IE on Win32 probably just emulated the quirky Nav4.x behavior here) leads me to believe this is worth it.
MozQ MozS MacIE5 WinIE5 WinIE6Q WinIE6S DC C L C C DH C L C C CH L L L L CC L L L C RH L L C L RC L L C C TC L L C C -- C L C C
The unlabeled column was Nav4 (on Mac).
Corrected table: MozQ MozS MacIE5 Nav4Mac WinIE5 WinIE6Q WinIE6S DC C L C C DH C L C C CH L L L L CC L L L C RH L L C L RC L L C C TC L L C C -- C C C C
tested with Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.8a4) Gecko/20040927 on Windows XP. example 1, quircks mode: C, C, L, L, L, L, L, C example 2, strict mode: L, L, L, L, L, L, L, C
This is a mass change. Every comment has "assigned-to-new" in it. I didn't look through the bugs, so I'm sorry if I change a bug which shouldn't be changed. But I guess these bugs are just bugs that were once assigned and people forgot to change the Status back when unassigning.
Bug 475986 changed the behavior here based on a newer compatibility analysis and made things less quirky. I think this should be wontfix.