Hi Tony,
Looks like IE does it again... It is not looking right for sure. Are all of your images identically sized? I could see IE possibly ignoring something or being different. It looks almost like one image looks aligned OK on the left and then they get progressively worse.

Yes, they are all the same size. When it first loads, the first slide looks fine, but as it scrolls...well...you see what happens.

I tried making the wrapper div a defined value instead of pulling from the image size and I also tried using an <--if IE8--> fix to pad the left side of the div and that didn't work either.

It looks like IE is calculating the image width differently than other browsers, so the slider's adding more than -870px to the margin each time to get the image to slide. Maybe it's a default amount of padding? try setting the padding to 0 for the img elements, maybe the li elements that contain the images as well.

It seems like it's a fixed number of pixes that's added again and again, making the gap worse as the slides progress...

I tried setting the padding to all of the <ul><li> classes as well as add a 0 pad to the a img property and the issue still exists.

Not sure what else I can specifically suggest, other than more trial and error. IE can be a pain...