Beeping noise when copying and pasting on Keynote
Whenever I will copy & paste an image from the Internet onto Keynote, a loud, quick beeping noise will come up. This is the same beeping noise that would happen if your Mac cannot do something, eg: continously holding down the "Delete" key. This is really annoying, and is there any way to turn this off?
MacBook Pro (13-inch, Mid 2012), OS X Mountain Lion (10.8.1)