IE has an option which controls whether or not you get the default error pages. Tools menu, select "Internet Options ...", click on the Advanced tab and look for "Show friendly HTTP error messages". When unchecked you should be able to see the custom 404 page instead of the IE default one. Odd that we can see Trekkie's with that option on. Is how your Server manages it? (I know I have to make it my Server Error Page for it to work for everyone.)

ratscloset
aka John