Last night I installed the latest updates for PS CS3 on 2 machines and both machines have the exact same color issues while printing with two different Canon printers.
Since this last update all images I try in print from 16bit ProPhoto or AdobeRGB 16bit, converted from Canon RAW through ACR look sepia tone, there is virtually no color (images still look as they did before on my monitor). In order to get the color to print I must convert image profiles to 8 or 16 Bit sRGB. I have not changed any settings after the update and confirmed that the update made no changes to the printers set up. sRGB 8bit jpeg images print color as seen on the monitor.
BOTTOM LINE: I can no longer print ProPhoto or AdobeRGB color space on my 8 color Canon Printer
Night help is you mention what OS you're on...and what model printer. And, actually, as this really isn't related to Camera Raw, you would get more (I don't know about better) help in the main Photoshop forum for your platform.
Both computers are PCs, one on XP, one on Vista, and printers are Canon i9900 and Canon ip4000 both are printing exactly the same way. Swoped printers between PCs with same outcome. Only changes made to both PCs was the CS3 update.
Jeff, I thought the problem may stem from the ACR RAW conversion as regular sRGB jpegs print the color as seen on my monitor. I have also submitted this question to the general PS forum...