Yes. You take me too literally sir. But a printer operation should just work when the proper driver is installed. To have to rename a printer to enable functionality is a ridiculous and obtuse hack. To have to guess at this solution is even worse.
To solve this problem (wireless/bonjour printing via AirPort Express no longer works properly after upgrading to Leopard), I did two things:
1) I downloaded a Leopard-specific driver from Epson (I have an Epson CX5000)
AND
2) as per a suggestion in this forum thread, renamed the printer to...