you don't mention anything about the latest Epson (or CS4) updates
did you review any of the numerous Epson-10.8 posts here (and all over the web)
Well I have update everything regularly and I keep checking for updates to make sure that's not the issue.
As for Epson reviews this is a printer I already had before I had to replace my broken MacBook with a new one, I never had any problems with my old MacBook printing using CS4 and my Epson printer.
Though I can't see how there is a compatibility issue when Photoshop work perfectly on my new MacBook and the printer will printer from any other programme, and even from Photoshop just not when using the Epson Paper profiles.
I already had before I had to replace my broken MacBook with a new one, I never had any problems with my old MacBook printing
point is 10.8 is the bleeding edge and there are a lot of posted Epson printing issues discussing its various issues
it may be in your best interest to state you have downloaded the latest print driver (version) off Epson-com, deleted the old printer(s) from Print & Fax (or 10.8 equivalent), rebooted, installed the latest driver fresh, added the printer back, ran Disk Utility: Repair Disk & Repair Permissions, rebooted the machine (and it still fails)
also what method you are connecting the printer (can you try a different method)
also posting a screenshot of your Photoshop File> Print window may be useful (what settings are you using)