What is *actually* wrong with IE ? besides the fact that its microsoft ?
It's a little feature-short, possibly even by Amiga browsers standard. No tabbed browsing, can't block pop-ups, can't block images, can't block cookies. Also, the caching doesn't seem to work properly in IE6 (forcing you to manually refresh, even though I have it set to "every visit to the page"), it also loses settings some of the time. If you open multiple windows the addresses in the drop-down address bar list don't stay in sync. I'm sure there are more examples.
It does have good points though, but these only extend as far as fast start-up and the ability to view pages which fail on other browsers (but this is often the fault of the 'designer' assuming that everybody is using IE, or using things like ActiveX)
Mozilla works here for 99% of websites and has none of the above flaws, plus I don't trust IE not to broadcast personal data in easily readable formats across the world without me asking.
Chris