Apple Mac Mini Desktop "rid safe boot" Questions

...rid of A pop up that froze safari on my Mac ? If you don't have a second backup browser (like Firefox or Chrome), follow the steps below. Restart your Mac holding down the shift key... that boots it ...

...safe boot fixed the problem so I knew it was a corruption glitch. Short version: I just did this two hours ago - July 18, 2009 - only the second or so time in a year, although it took me a lot of ...