Nine months as a systems analyst at a hedge fund. I liked that genre of work and had done it once before for almost five years. However, this time the project manager was not only incompetent but quick to cast blame and quicker to claim credit when we rescued her work. The other analyst and I had been hired at about the same time. We both quit in the same week, giving notice to her boss, not to her.
I found out that we were not the first two systems analysts to quit in the short term after dealing with that project manager. Her boss wanted to know from both of us if we would stay on "in the event the project manager decides to move on in the near future." Hah. We both said no. We felt the environment had got too toxic from the partners' dissatisfaction with the work of our boss, even after we straightened out the specs and got them what they had wanted. I don't know what the other analyst said but I said simply "You pretty much need a clean slate to make the partners feel more comfortable with your IT group." It's not like this guy didn't know he had to let that manager go.
It had been a pretty stressful situation. The worst ever in my experience and I made it worse for myself trying to stick for a year, even knowing the toll it was taking on my mental health! After leaving, I took six months off before I even called my headhunter back to look for work again. Actually it all worked out okay. You can get away with a short stint at an in-house job if it's an anomaly on your resumé and you manage to get a decent reference out of the place you left. I made it pretty clear I expected a good reference when I gave notice to my nightmarish project manager's boss, and I did get one. Next job worked out much better. Win some, lose some...