Our friends at Microsoft have a lot of work to do until their new born browser IE8 (Still in Beta 2) actually works the way it should.
It seems that there is a major event triggering issue. Lots of jQuery core functionalities depends of events. For the ones interested to see some upcoming bugs, download IE8 beta 2 and visit the following links. Jquery Corner. (Not working) http://www.malsup.com/jquery/corner/