I've had a bit of a headache with a user using IE9 who has been seeing a cached version a website I've built for them, rather than the 'actual' version.
On deleting the cache / temp internet files / cookies from the Tools > Internet Options window, the issue remained.
However, using F12 dev tools and Cache > Clear browser cache for this domain, the issue was resolved.
Do the 2 methods vary at all? Or are they identical and the issue lay elsewhere?