You can read about it here! (http://www.thenewcivilrightsmovement.com/russian_authorities_forced_to_allow_a_same_sex_wedding)
Long story short, the Russian officials had no choice but to allow two women to get married together because one of them had once been male and was legally still recognized as such so legally they were considered a heterosexual couple.
I just love it when discriminating laws like this can be used against each other. :D
LMAO! Especially since those recent problems with homosexuality in Russia.