Mozilla browser doesn's support well HTML4 tag <COL> and it's attributes a styles. Expected rendering of small test file: 1. cells A, D and G should contain red text in sans-serif font (<COL CLASS="foo">) 2. content of cells A, D and G should be aligned to right (<COL ALIGN=RIGHT>) 3. cells B, E and H should contain blue text in sans-serif font (<COL STYLE="font-family:sans-serif;color:#0000FF">) 4. content of cells B, E and H should be vertically aligned to top (<COL VALIGN=TOP>) 5. cells C, F and I should have 15px padding on left side Actual: Nothing! Notes: * Test will be rendered in Strict standards compliance mode. * MSIE 5.5 and 6.0 render test fine -> IE parity (20020125/WinNT4)

I guess this is a dupe - bug 915

Oops, it could be, but only for ALIGN and VALIGN (2. and 4.). Attributes CLASS and STYLE aren't covered by bug 915.

Invalid. See the CSS2 spec, http://www.w3.org/TR/REC-CSS2/tables.html#q4 Basically, the only styles applied to COL tags that can affect the way cells look are border, background, width, and visibility. Align and valign should be special-cased as attributes (bug 915) and dropped as styles (as they are now).

Verified Invalid.