If I copy 10 simple cells to the clipboard, then try to use the Paste All function in the clipboard, all 10 cells will often not paste. For Example: If I type 1,2,3,4,5 - each number getting its own cell, then individually copy each cell into the clip board, then click Paste All, sometimes it will Paste 1,2,3,4,5 - but most of the time it will paste something like 1,3,4,5 or 1,2,5. It doesnt paste each individual cell that was copied to the clipboard. This happens more frequently than not for months.