A quick fix that worked for me

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Infirc

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Senior Member

02-02-2012

Edit: Please read whole
Edit: Apparently some Pre-patch files Overwrite Post-patch corrupted files.

Well i kind of expermented the crashes yesterday so i went to the launcher and switched to the European server which hadn't been updated to the Ziggs patch yet, then i logged in to load the files, logged out, went to the launcher again and switched back to American server, apparently some European files overwrote corrupted patch files, and i haven't experimented crashes anymore, how did i know it work? my first mastery page read "pagina de maestrias" when i hopped into a game.
Haven't experimented the crashes today.