No rhyme or reason...only on some machines...copy, paste and cut do not work in InDesign CS6. I can open the document on another machine and it works fine. I have created a new document on the afflicted machines and they do the same thing - none of those commands or menu selections work.
I have tried the following:
• Replaced preference files for InDesign
• Used Terminal to do - echo "" | pbcopy - to clear the clipboard
Check the system prefs and your other applications to see which is hijacking the shortcuts.
All computers in our lab are set up identically. If another app were hijacking the shortcuts, they all would have the same problem. It is also not just the shortcuts - the menu selections do not work either.
Does it happen if you create a new user and run InDesign from the new user?