What drives you crazy about project management?

Uncorporating project sponsor who have less clue of the expected outcome and the processes to achieve project success

What about untimebox meeting? meeting where less important or lower priority point take more time than critical or key points.

Information that is circulated to all, without minimal clarity, Who, Why When type of information.

One size fits all standards, methodologies, practices & tools

I'm with Sante on meetings, we take minutes and often waste hours.

Stupid people who has one template for everything and they have no clue how to use it even,,,

Non-productive meetings

Meetings for the sake of having meetings

Meetings, Mails, improper documentation in real life projects-- these are main causes that drives me crazy personally.
At the same time, these are the things which guide you thru' crunch time.
One meeting, mail or a single document will put light on your doubts, confusion and then you have clear picture how to proceed further.
It depends on the contents of meeting, mail or document whether they help you make decision or more of them required to clear the picture.