I tried creating a custom widget with the My Custom Widgets plugin that would allow me to create a Google Adsense skyscraper ad on the left sidebar. It showed up really weird in internet explorer, as seen if you view it in that browser. I tried disabling the widget to get rid of it, that didn't work. Deleted the widget via FTP, that didn't work. Cleared my browser cache, that didn't work. I cannot get this white block with the "Page not found" error to go away in IE, no matter what I do. It looks fine with firefox, but not IE.