Joe,
interesting.
Cocktail: so you don't use it anymore then?
Onyx -- if something is free but you don't need it, then why have it? It's just clutter.
MacPilot -- Launch services -- never heard of that. Of course I don't know a lot of things until a problem arises.
Tinker Tool. I'm amazed it solved this issue. Which cache did it flush that Cocktail did/could not?

This is what I run once a month:
http://imageshack.us/photo/my-images/862/screenshot20110618at938.jpg/

Now I don't believe in upgrading Cocktail if Tinker tool is better. But I don't think Tinker tool has a button that will run the scripts, the caches, and the repair permission in one fell swoop right? With Tinkertool it seems you have to tab through several tabs and click several buttons which is tedious.

Joe, I would love to see you list of monthly maintenance. Once month I click that button in cocktail and I repair each hardrive manually. that's my monthly maintenance for my imac.