Another of our alert readers poses an interesting question: Why is it that when KETV anchor Rob McCartney has the night off, Julie Cornell usually solos, but when Julie is gone, McCartney almost always gets a substitute co-anchor? This week, for example, McCartney was accompanied by stiff-as-a-board Suzanne Deyo on Monday and Tuesday, and by Brandi Petersen on Wednesday and Thursday. What is the