It’s pointedly not a compliance test (from the Test Guide: “Acid2 does not guarantee conformance with any specification”). As a wish list, it is really important and useful to my team, but it isn’t even intended, in my understanding, as our priority list for IE7.

In that vein, I’ve seen a lot of comments asking if we will pass the Acid2 browser test published by the Web Standards Project when IE7 ships. I’ll go ahead and relieve the suspense by saying we will not pass this test when IE7 ships. The original Acid Test tested only the CSS 1 box model, and actually became part of the W3C CSS1 Test Suite since it was a fairly narrow test – but the Acid 2 Test covers a wide set of functionality and standards, not just from CSS2.1 and HTML 4.01, selected by the authors as a “wish list” of features they’d like to have. It’s pointedly not a compliance test (from the Test Guide: “Acid2 does not guarantee conformance with any specification”). As a wish list, it is really important and useful to my team, but it isn’t even intended, in my understanding, as our priority list for IE7.

We fully recognize that IE is behind the game today in CSS support. We’ve dug through the Acid 2 Test and analyzed IE’s problems with the test in some great detail, and we’ve made sure the bugs and features are on our list - however, there are some fairly large and difficult features to implement, and they will not all sort to the top of the stack in IE7. I believe we are doing a much better service to web developers out there in IE7 by fixing our known bang-your-head-on-the-desk bugs and usability problems first, and prioritizing the most commonly-requested features based on all the feedback we've had.