After being embarrassed by failing to check the Clone/heal tool to make sure the opacity was set correctly, I am encouraged to ask another question that was not affected by the appropriate correction that made the tool work fine under most circumstances. However, using LR4 (and previously LR 3) )iMac 27 quad) at odd intervals, certain images show up with a single white spot, usually on a blue background, that cannot be removed or cloned with the LR Clone/heal tool. It can be removed with the clone tool in PS but not in LR. I don't know where the spots come from. They sometimes show up in a sequence of 3-4 or just singly. A copy of one is attached here. I don't know if this spot is an aberation in LR or from my cameras. Since it's happened with different cameras, I presume this is some problem with LR. Any comments?
