Localhost and IP Yield Different Pages

[Bill Winspur]

I've just wasted an hour or so debugging a non-existent problem with my default-app configuration that was caused by IE's page cache ! It had locked onto a page for http://localhost which it presented instead of the page I'd confugured.  Short of persuading MS to get out of the html page-caching business (and the filesystem caching busines while they're at it), does anybody know how to flush all of IE's 'performance-boosting' (hah!), caches ?