I live outside the US, in Oceania, and over the year I have downloaded firmware from the US, Europe etc. and found no disfunction in my gear from doing so. If you have downloaded it, I would simply suggest using the camera as intended and seeing if there are any changes to its operation that don't look appropriate.
cheers, TREVOR
The mark of good photographer is less what they hold in their hand, it's more what they hold in their head;
"All the variety, all the charm, all the beauty of life is made up of light and shadow", Leo Tolstoy;
"Skill in photography is acquired by practice and not by purchase" Percy W. Harris
