Boris's tongue-in-cheek comment about a disco ball might be not far from the truth. There are a number of issues with CFL's including a sensitivity to dirty power... low voltage or voltage fluctuations which can shorten the lives of CFLs.
They should never be used with a dimmer, and they don't like high temperatures like in 'can' or semi-enclosed fixtures.
Jostling and vibration and frequent on/off switching will shorten their life. DO check the sockets for rusting. Under ideal conditions a CFL should last about 6x as long as an incandescent.
Hopefully, CFL is an interim solution, and the promised improvements to L.E.D. technology will eventually develope a bright, reliable, energy-effiecient, 'green' lightbulb.