There were a few snags with Internet Explorer when I launched this site. I updated the CSS to fix the following:
Force the text above the background (IE was drawing the content below the background for some odd reason)
Fix the width to an actual size instead of relying on min-width or max-width
Move the logo into the correct position for Internet Explorer
Add a margin for forms with IE, as it was overlapping one form element over another
Thankfully, these small changes were both easy to figure out and implement.