Yes, I wrote it myself.  According to the latest stats Opera is used by less than 1% of internet users. When designing the script I made it 100% function for IE 5.0 and up, and at least basicly functional for Netscape (about 4% of internet users).

If memory serves me correctly, Opera has the option to ’mimic’ IE by making the script think it’s IE, but not as far as actually providing all the functionality of IE. If you have your browser to that setting then the script would be sending you lots of complicated JavaScript that will work only on IE. By turning that setting of a simpler page would be sent, that might work better.