In the 95 Theses, Luther makes a stand against corruption in the Catholic church of that day. This resulted in events leading to the separation between the Catholic and Protestant churches.
It seems the theses are always referred to, but never actually read. Their content does make me a bit uneasy, especially this part (the English translation used as source):
71: Let him who speaks against the truth concerning papal indulgences be anathema and accursed.
Or, the original for those that know Latin:
71: Contra veniarum apostolicarum veritatem qui loquitur, sit ille anathema et maladictus.
Now, I have never heard even one Protestant speak positively about indulgences. What are Luther's motives in saying this (especially in such strong words), and did he later on change his mind?
Edit: Thanks to Caleb's suggestion, I'll add some other relevant theses to provide context.
67: The indulgences which the demagogues acclaim as the greatest graces are actually understood to be such only insofar as they promote gain.
68: They are nevertheless in truth the most insignificant graces when compared with the grace of God and the piety of the cross.
91: If, therefore, indulgences were preached according to the spirit and intention of the pope, all these doubts would be readily resolved. Indeed, they would not exist.
It seems quite clear to me that Luther didn't oppose indulgences per se, rather just the sale and abuse of them and the exaggeration of their power. If I'm wrong here, please provide some good references to show that.