[Edit: This post was originally entitled "BUGged Wizards?"]
It looks like I can't recruit any units at all in province 52 on the map Aran. Not soldiers or leaders. I don't have many resources per turn, but I do have enough to recruit something. Yet, no matter what is in the queue, nothing will recruit on the following turn.
Sometimes, if there are castles in the adjacent square, it will show you as having resources, but you do not. try destroying a nearby castle and i bet your problem is solved.
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"War is an art and as such is not susceptible of explanation by fixed formula."
- General George Patton Jr.