Keep in mind also that the company is having a difficult time forecasting demand because passenger travel habits have changed. Most folks use to buy tickets more than 21 days in advance; therefore, airlines had the advantage of being able to staff their operations with some level of certainty.
Nowadays, passengers are booking their tickets much closer to the date they actually travel because they are getting the best deals on unsold seats (in this weak economy). This makes staffing really difficult to judge.
I would expect us to run critically lean for some time.