Bookmarklet which loads external script
javascript:void((function(D) { var s = D.createElement('script'); s.src = "http://where.script/is"; D.body.appendChild(s); })(document))
javascript:void((function(D) { var s = D.createElement('script'); s.src = "http://where.script/is"; D.body.appendChild(s); })(document))
If you’re in Firefox, drag this link to your bookmarks bar and when you click it, it will reload all of the CSS files referenced by whatever page you’re currently looking at.
I can’t take credit for this, however. I first saw it today on the #css channel of irc.freenode.net by user “gimpscape”