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I'm running IIS7 - and for some reason the HTTP headers indicate a cached page has been served (e.g. Firefox's Firebug shows 304 Not Modified) yet the same page in fiddler for an IE8 request it says:

200 OK (text/css)

I've looked in my Applicationhost.config and I see:

Not to mention, firefox shows that the pages are cached. Does anyone have any ideas on this? My site is really slow on IE - hoping that getting caching turned on will help.

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