Power User :(
In every job I've ever worked at in the science and medical fields where I was NOT hired as a computer person, I end up being the local "power user" that everyone brings their problems to first (I have a background in IT support). I get asked to look at things because since I am already there, it is cheaper and quicker than making a proper request to IT or wherever.
Like Mr. Glynn says, it sucks. People even bring in their own, personal, computers to work and expect me to take a look at them. When I need to call IT, they brush me off then return the same conclusion to a technical problem that I do- three weeks later. If I try to make a request to buy a replacement part to keep our equipment working, management tells me that I was not hired to do support and I need to wait two months for IT to do it. The reason I put up with this stuff? Because keeping my own gear running is faster and easier than trusting the official people to do it for me. And I'm too nice not to help other people in the same situation if I can.
As I was typing this I just got a call on my cell phone. I am not kidding. Someone with a "dead laptop" issued to them by the University. The solution was to make sure it was plugged in and the power button was pushed. It would be inconsiderate to have thrown this poor clueless user to the mercy of the Helpdesk, but really can we get some IT training opportunities for people like this?