Possibly since I installed 10.1.5, I find that I cannot copy and paste files in the Finder. I will copy it, but either it doesn't get copied or paste doesn't work. Paste is always grayed out. Anyone know why this would be?
Sounds like something is wrong with your install. You may have to re-install. I have actually not seen this bug or have encountered it myself. So my only offering for you is to re-install 10.1.5.