User-Agent: Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; BCD2000; MyIE2; .NET CLR 1.1.4322) Build Identifier: Gecko/20040316 <colgroup> <col style=" "> </colgroup> style id not in effect Reproducible: Always Steps to Reproduce: 1.just copy the code above 2. 3. Expected Results: to use style as explorer does and html4 supports

Most of the properties you are trying to apply to <col> don't apply to it (as in, IE is buggy in applying them). See http://www.w3.org/TR/CSS21/tables.html#q4 The background is applied in standards mode now (bug 4510), and we hope to fix it in quirks mode in 1.8a (do we have a bug on that, fantasai?)

yep: bug 237078

*** This bug has been marked as a duplicate of 237078 ***

Hmm, this bug is sooo bug 915, why dupe it to the background bug, when we have such a good dumping place. Reporter http://ln.hixie.ch/?start=1070385285&count=1 might be a interesting read for you.

Because 915 is about the handling of stylistic HTML attributes on <col>, and there weren't any in this case. The page is just using CSS on the <col>. So most of the bug is clearly invalid, with the exception of the background thing.