Defeat ManBearPig not unlocking

[GloryChicken]

I defeated Al Gore and completed "Unfriend Al Gore".  I took the key from him, went into the back room and took the items from the chest.  All the info I've read says that Defeat ManBearPig is supposed to unlock, but I've rebooted the save and haven't seen it happen.  I'm on Day 2 if that matters.

[Amentep]

It didn't unlock for me until sometime after I'd defeated Al Gore, IIRC.  Unfortunately I can't say how long after and I'm not back at that point yet in the game, but it didn't happen immediately.  I recall because I was midway through another quest when I got Al's message that ManBearPig was attacking near the church.