Just registered on this forum after I found this post.
I have an EPSON Stylus Pro 9600. As of a few days ago, when I print from photoshop CS6 I only get an 8" strip from a seemingly random spot in my image. I have tried deleting/adding printer, re-installing drivers, re-initializing the printer and of course re-booting everything many times. So far this has happened on prints from 11x13 to 36x48 inches, but only when printing from photoshop. Any ideas would be appreciated.
OS X 10.7.5
Photoshop CS6 13.0 x64
I have been on the phone with Epson. My situation is not exactly like yours, since I and getting an 8.25" strip from the center of my image and because this problem persists with other software in addition to Photoshop. However, what this is looking like after talking with Epson (I haven't yet given up and am trying to get a senior engineer on the phone) is that my printer the 1400 may simply not be able to print on any paper other than a standard size. When I try to do this, it simply crops it to fit on an 8.5 x 11 sheet. It is hard for me to believe this is true, as artists and photographers (at least this is true for me) may print on a variety of non-standard page sizes.
The Epson driver provides the option of custom sizes but it is possible that the printer may simple not be able to deal with custom sizes.
I will let you know if I discover anything further.