I want to help I really do, but as far as I'm concerned it's IE. I don't even test my sites in IE, I just can't be bothered dealing with those who don't help themselves... Out of curiosity though what version of IE? Have you tried the later/older version?
jQuery actively supports these browsers: Firefox 2.0+ Internet Explorer 6+ Safari 3+ Opera 10.6+ Chrome 8+ Any problem with them should be considered and reported as a bug in jQuery. http://docs.jquery.com/Browser_compatibility (IMHO: I suppose bug will be in your code)