Assuming the anecdote is accurate, my guess is this was Steve's subtle way of nudging Vic to be more attentive to details. I don't think Steve would call anyone at anytime making a fuss over such a small thing - he would never get any work done.

Call someone who's work is starting to slip once on a Sunday to complain about some minutiae, and you are letting them know that you are watching - even if you aren't really watching all the time. I think this is a leadership technique, not the micro-management it appears to be.

This also is a way of Steve asserting control and dominance. Making someone scurry over a mis-tinted letter sets the tenor of the relationship.

I think it's important not to take the wrong lessons from all these anecdotes. Jobs knows how to get good work out of people by causing them to demand perfection of themselves and to fear producing imperfect products. No CEO has time to exact perfection end to end - their job is to set standards, expectation, and culture. Sometimes ridiculous demonstrations of micro-management are just what someone needs.