Reimbursing employer for flexible spending account purchases when leaving job before year-end?

I had targeted $1,200 for my employer-sponsored flexible spending account (FSA) for the entire year 2006 and used $900 through July. Up to July I had contributed $700 to the FSA plan. If I leave my job in August, will I need to repay the difference of the amount ($900-$700)?



Please include the source in your answer. While the answer to this question seems common sense, loopholes sometimes do exist.