Why is Photoshop CS5 scaling 11 x 8.5 images to 11.222 x 8.667 in Print?

Question

I have my document set for 11" x 8.5" paper. Anyone have an idea why Photoshop CS5 Extended would up scale 11" x 8.5" sheet to 11.222" x 8.667" ? I cannot find anything in CS5 Preferences or my Epson Printer that would do this. Under Print/Printer Settings.../Presets/Copies & Pages idicates a Scale of 98% which would enlarge 11" (11.000" ÷ 98% = 11.224") but I don't see a preference setting to change that. NOTE: Please disregard Scale to Fit Media as Photoshop does this on every document.
Any suggestions?

Answer 1

Ross,
There's no point in my arguing with you, but you don't get to tell me or anyone else when to respond or not to respond to any given post.  Just because you start a thread, that doesn't mean you own it.
I will respond as I see fit, meaning whenever and how I see fit.  Deal with it.
It's not all about you.  There will be forum users in the future who will be reading this thread, and they deserve to be given correct information.
I still see no indication in any of your posts that you have tried trashing your Photoshop preferences, which is the most basic troubleshooting step to take whenever things begin acting weirdly.  Nor do we know whether your copy of Photoshop is updated to version 12.0.4 and if you are using the latest version of the applicable Epson printer driver.  But that's a moot point in the light of your "Current Preset" settings.
The second screen shot in your original post clearly shows that you are using a "Current" preset that includes a paper size of of "US Letter (Borderless)".  I have already told you that, when you print borderless, the printer driver automatically enlarges the image, always, in order to "bleed" the image to avoid leaving white spaces around the edges of the image. That is perfectly consistent with the size of 11.208" x 8.667" you are seeing.
I had already mentioned that in an earlier post:
Tai Lao wrote:
…the Epson printer driver automatically enlarges your image a bit when you print borderless just to make sure there are no white spaces around the edges of the image…
Conversely, if you choose a non-borderless paper size, the image will not be automatically enlarged.  But if you choose US Letter Size Non-Borderless and send an exact 8.5" x 11" dimensioned image to the printer, then your image will even be slightly reduced, to allow for the non-printable area of the paper where the printer has to grip the paper.
Common sense dictates that if you are printing on non-borderless US Letter Size paper you do not throw an exactly 8.5" x 11" inch image at the printer, but a smaller one (say 8.2" by 10.7") in order to prevent any scaling of the image.
All that being said, at this point it is entirely none of my business whether you grasp these concepts and whether your prints come out exactly like you want them or not.  I'm responding for the benefit of future readers, not you.
The way a user can "change" the values of his "Current" printing preset is to delete said "Current" preset altogether and create new settings in the various dialog boxes of the printer driver and saving those new settings as a new preset under a different name.
Sorry if you felt slighted by my seemingly derogatory references to all-in-one printers and/or your online instructor.  
Wo Tai Lao Le
我太老了