I'm tired, so I could be wrong... but I think list-style:none only needs to be applied to ul. If you remove it from li, does it change anything with IE? If not, how about the other way around?
What happens if you play with padding-left?
Maybe try defining the style right in the UL tag with something like this: style="list-style:none;"
If that makes a difference, I'd probably just give the whole style sheet a second look to see if there's anything that could be confusing IE.
Other than that, maybe post the URL to see if anything stands out. Or even a screen shot of that area & the CSS file contents, if it's not a site you want to post here.
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