IE5.5: First Look

Friday December 3rd, 1999

I've done some preliminary CSS testing of IE5.5 (available through Specifically I ran IE 5.5 through the battery of David Baron's CSS tests, and found some interesting results. IE 5.5's CSS support has undergone very little change from 5.0, and some regressions were noticable. IE 5.5 seems to pass test 5.3 (CSS2 Universal Selector) that IE 5.0 did not, but it fails two tests in section 6.4.4 (Parsing Test 4 and Test 5) that IE 5.0 apparently passed. There was one other that *may* have passed (9.1.2) where 5.0 failed, and one test in 10.7 *may* have failed where 5.0 passed, but I can't determine these for a certainty. Finally, IE 5.5 still does not pass the Box Acid Test.

According to MS's "What's New in Internet Explorer 5.5" page, IE 5.5 handles more "CSS styles" such as first-letter and first-line, but they don't go into any more detail.

From these results, I'm wondering if MS is giving up completely on significant advances in the CSS support in their current rendering engine. IE on the Mac is supposedly being developed to utilize a new rendering engine, codename "Tasman". Maybe Microsoft is planning something similar for their 6.0 Windows version.

In any event it does not look like the next version of IE will have significant CSS improvements as many hoped and expected.

#7 Sometime next year?

by gerbilpower <>

Friday December 3rd, 1999 3:31 PM

You are replying to this message

Yeah the bugs are still high but they should eventually hit a peak before dropping. In the past few days the M12 open bug list was driven down a few hundred.

Yes, Mozilla is late but there is nothing we can do but make our contributions (bug reporting, submitting code, etc.) and follow the schedule which is looking at a release well within the first half of next year.

MS Bashing? I have not been with MozZine since the very beginning but I just MS bash just as a venting cap. I'm more concern with, and tired of, the endless debate over the definition of alpha and its contrast with a final release product.