Until short this used to display an arrow in the button. However since a few days (it might be after a recent update of the palette) the buttons look like this:
Not necessarily. CTRL-F5 does not necessarily reload all the stuff pulled in by the page. It will reload the main url but not necessarily the rest. The only way to be certain is to clear the cache. I know this from wasting time in the past looking for an issue, then eventually I cleared the cache and all was magically ok.