Yes, diacritics are that important to me, particularly when it changes both the meaning and pronunciation of the word.
Pretty sure that it doesn't matter considering it's not even in the right alphabet, you could probably figure out the pronunciation given the context, and that the meaning is simply "Woman of the Mavratilovs."[sic] Don't read any Russian books if they are that important to you in comprehending words or names, you'll be disappointed. Czech letters I am sure are key to pronunciation, but understanding? In this case, I'm not so sure.
Additionally, if the strip that makes you laugh the most only does so as a result of some weird pleasure over your own pedantry, you may need to reexamine your reasons for reading the comic.
ETA: Also, Wikipedia tells me you missed one. Apparently they're not that important.
ETAA: I'm really not a bad guy.