I have just upgraded to latest version 10.3.0.5771 (64 Bit), it looks no more "Copy & Paste" friendly.
I do often using "Ctrl + C" and "Ctrl + P" on a cell to another cell, the new version requires you not only stay on the cell to copy or paste, you need to click and enter into the cell to perform this action.
Am I missing something with the new version?