Good question with a bad answer: It depends. Repeating the exact same procedure each time here are the results: Grayed out paste, paste available, grayed out paste, PASTED correctly, Pasted correctly, gray, gray, pasted, pasted, blank, etc... Very strange behavior. Same results using Word. BTW, Word is affected with the same issue. I copied a line of text and repeatedly pasted in the same document and got similar results.