Epson Stylus Photo R1800 now working
This is how I got back to a fully functioning printer (Note: don't skip any steps, like I did initially).
1. Open up the print and fax dialogue box in system preferences. Highlight the Epson printer and click on the "minus box" to delete that printer driver.
2. Restart your computer (very important)
3. Go to the Epson Website ( http://www.epson.com/cgi-bin/Store/support/supDetail.jsp?BV_UseBVCookie=yes&oid= 14121&infoType=Downloads) and download Epson EasyPrint v3.1bA and Printer Driver v3.0aAs.
4. Install both downloads.
5. Open up the print and fax dialogue box again. If the Epson R1800 shows up again, highlight it and click on the minus sign to delete it again. Then click on the "plus" sign and add the R1800 back.
6. Look for the menu that says "Print Using." Make sure to select Epson SP R1800 (1) and not the Gutenprint option.
7. Close the dialogue box and you should be good to go.
This procedure returned my original (pre-Leopard) set of options to the R1800 and, once again, I'm getting nice prints.
Note: I do have to access that menu in a new way from Photoshop
a. make sure the triangle next to Epson Stylus Photo R1800 in the print dialogue box is pointing up to reveal the expanded menu selection.
b. under the popup menu where "layout" is listed, select "Print Settings" and you should se the menu you are used to for the R1800.
I hope this helps.
Mac Pro, Mac OS X (10.5.1)