@jea, here is another example of where if you could just provide a little more information about what you are seeing as a potential error, it would not require us guessing about your question. Do you maybe mean the rim bruise on the back of the cent? That is damage. I'm also on seeing mild corrosion on the rev.
"If you climb a good tree, you get a push." -----Ghanaian proverb
"The danger we all now face is distinguishing between what is authentic and what is performed." -----King Adz
Please always tell us in detail exactly what you see with your coins, then make sure to give us a good, sharp close up of your issue. Please don't make us guess of what your problem is, as we are bad at guessing.