Vagary

Today I heard someone complain about Treasury Secretary Timothy Geithner's financial plan. The worst thing, according to this commentator, was the vagary of the plan. Checking Merriam-Webster, I formulated the following distinction:

Vagueness: lack of clarity or definiteness.

Vagary: an erratic, unpredictable, or extravagant manifestation, action, or notion.

The commentator meant vagueness.