Short Version: Repair Permissions after installing 10.6
I went through the Snow Leopard upgrade process this past weekend. It was not optimal.
The above process documented by Lloyd Chambers works, and is just about as simple as it sounds.
But, I ran in to another problem that confused things rather a lot.
- When I installed Snow Leopard, my permissions got messed up. This had never happened to me before.
- Long story short, if your first print after following Lloyd's instructions looks rubbish (my shadows were blocked and there was magenta everywhere), go to your disk utility and repair permissions on your main drive.
- Clean your nozzles while you are at it
My Time Machine volume also got messed up in all this...
Now, so far so good, no problems printing. This really should have been a very simple 5 minute process to follow Lloyd's instructions but for my permissions borking.