Rev: 7201
What it's doing: When the buff expires, either by right-clicking it or the timer running out, the priest comes back to life. In a sense, the priest never dies and is always able to heal and therefor pretty exploitable.
What it should do: When the buff expires, the priest should die like normal. The as would happen if they never became a spirit to begin with.
How to repeat: Make a priest, level up to get the necessary amount of talent points to get the Spirit of Redemption talent, then die. Either right-click the buff or let it expire and you'll witness this bug.
http://thottbot.com/s20711