I did not say "Fix this"! The feedback was only to make you aware of the problem. I have not described the problem in the feedback because I provided the link to this threat, where to problem is described.
For me I fixed the problem returning back to the IE6.
To WordPress I would recommend to handle this issue as the majority of users are still using IE. I think this will last for the future because of the MS monopoly on the operating systems market.
The not so sophisticated user is buying a PC, mostly including an MS operating system on which IE is per-installed. Automatical updates will also update IE. Assume the user has IE7. He/she has heard about Web 2.0 and bolgs, which are a fancy must-have. Discovering different blog providers he/she also comes by a blog hosted by WordPress. What would you do if you see a post which should contain a list but does not? Looking for an other provider?