In addition to the above, I've also noticed that printing from Illustrator CS3 results in lower resolution line art, as if the screen res image is printing, rather than Illustrator outputting at the resolution of the printer. The same Illustrator file, opened in Photoshop, will print at whatever resolution it is rastered to on import.
The second problem is that the Epson driver doesn't appear to pay attention to the settings, coating the page with gloss optimizer and using photo black ink even when paper has explicitly been set to plain paper with gloss optimizer turned off.
On my Epson 4000 and 9880, I've used the Colorburst RIP. Does anyone know of a similar software RIP for the R1900?
Also Epson Utility appears to not work at all if the R1900 is either on a shared computer, or plugged into the USB Port of an AiPort base station or Time Capsule? Are there plans to add this functionality? It's a drag to not be able to see the ink level remaining from any computer other than the one the printer is connected to, or not from any computer if the printer is connected to the TimeCapsule basestation.