I've noticed the last couple of weeks that a hard-refresh won't clear the cache anymore in Chrome... well to me and two clients of mine (we're all on a Mac by the way). Not sure either if there was an update to Chrome recently which might cause this now.
Did anyone else noticed this as well? I work with my developer tools always open, so my cache is disabled by default, but asking my clients to open developer tools before refreshig the page, I'd rather avoid :)