Last year when I went on vacation to England, my flag changed from the Stars and Stripes to the Union Jack. The flag seems to be determined by IP address (what else could it be?), and so clm is probably in Italy at the moment. Ciao!
It has been changed since then: your initial country setting is determined by IP, but you can change it in the account settings.
Whatever it is set to there is the flag that is used (regardless of where you are).
3 days ago 'clm' changed his country from Spain to Italy in the account settings.