(Although, the misplaced accents over the Ω and и (omega and cyrillic I) perhaps lend credence to the "by having these 'faults' we are ensuring it is a registrable trademark" theory.)
I don't know about omega, but cyrillic letter I with diacritic (Й) is legal (It is the eleventh letter in the Russian alphabet). See http://en.wikipedia.org/wiki/Short_I