BINGO!!! bogdanw thank you so much for sticking with the problem. For good measure, I followed your previous suggestion of quitting all apps before restarting. I am usually lazy and let the OS close all the app when I shutdown or restart. Perhaps that is how the file corruption occurred in the first place. I am going to follow that procedure in the future just as a precaution.
On another note, the OS is running better than it ever has probably because I did a lot of cleaning out old crap in the process of trying to solve this problem. Once again, thanks a ton. I am going to have to become a supporting member now.