I could print to my S450 from my iBook and eMac all through 10.2 (and with the iBook through 10.1, as well), but with 10.3 I've lost the ability to print entirely.
It halts the print queue, and when I click to start it up again, it says "connecting to printer", then stops, and halts the print queue claiming an error of some kind.
What gives, it's midterm season!
I can holding back to update on high-end production or print systems, but this is for a lowish-end consumer printer that has worked fine for years in the Mac OS!