CSS Bug in IE: Can't Solve

My new design for glennf.com uses CSS. However, I'm stymied by the Internet Explorer CSS bug that doesn't support CSS positioning correctly. Anyone have ideas? Thanks!(I turned on comments to try out whether I'd get useful help: the first was just a stupid insult. Sigh. Oh, well. Please email me instead.) Update: Setting the CSS class selector "rightcolumn" to position: absolute instead of position:relative solved the problem. Thanks to Jonathan Clapper for his advice!