A year ago, I left my job for a new one. That didn't work out for several reasons, and my year contract ends soon. It so happens that my old employer is offering me my old job back (their initiative). I loved the people there and the organization has improved, so I'll probably accept.
I just have one doubt: say that at some point in the future I will be looking for work again, how will this look on my resume? How much of a red mark is it?