Mob spawning is off after a preventative measure I took against mio and zombie egg spamming me. I forgot to revert it before I went to sleep, and I apologize.
Mcmmo is having its problems because our mcmmo.users file is too large. An entry for every user that joins, no matter whether they gain any levels, or even any exp, really adds up. The file is around 1.2 million bytes. Last night I went through a series of attempts to convert us to mySQL with numerous failures.
Not much more can be done without my collaborating with Rigby on the matter.