The noise is gone! Finally. I noticed that when I logged out and had to type my password to log back in, the "boop"ing noise wasn't there, but as soon as I was logged in it would start. I have 15 things set as Startup Items in the Accounts pref pane, so I began disabling them, and discovered that disabling KeystrokeRecorder X stopped the sounds; its plist file was damaged and trashing it solved the constant typing noise. Ahhh! For those who aren't familiar with KeystrokeRecorder X, check it out at http://www.campsoftware.com/ksr.htm. It's not cheap, but I've used it for years and it's saved me many headaches, getting unsaved text back after unexpected crashes. Thanks very much for all the input I got on this problem! I greatly appreciate the help. --Bill