Troubles Displaying Special Characters In Back-End

Hi! :-)
I am having troubles displaying special characters (example: à è ì ò ù °) in back-end, more specificly - when viewing an order.

First of all, I did not change anything about this, all code and settings are default so I don't really know, why are they not displaying.

Second, problem is, that if special character is on first place in word, whole word is not displayed, which means sometimes whole address is not displayed.

Third, I checked in database but everything is NOT saved correctly also there.

Can someone help me?

Thanks in advance, regards.