Some photostream images getting cropped on ipad, but not mac?

Question

Not sure where to post this since it involves photostream behavior on Mac vs iPad?  So my apologies if this is misplaced.
Recently some images that were imported into iPhoto on my Mac, and are automatically sent to Photostream, become cropped in photostream, or at least they appear to be cropped on both an iPad and on AppleTV 2nd gen, but look fine when viewing photostream on the Mac.  What's weird is the pic is cropped on the iPad, but it is the same size (pixels) as is indicated on the Mac of the original (1,488 x 1,011).  By "cropped" I mean that only a portion of the photo is visible (just wanted to clear that up since the pixel count seems to be the same, so not the conventional form of cropping).  Several pics behave this way, and they all seem to be ones that started life as scanned images of old prints, although not ALL of the scanned pics behave this way... only a few.
The following description was copied from here:  http://support.apple.com/kb/HT4486http://
What resolution are My Photo Stream photos?
On your Mac or PC, your photos are downloaded and stored in full resolution. On your iPhone, iPad, iPod touch, and Apple TV, your Photo Stream photos are delivered in a device-optimized resolution that speeds downloads and saves storage space. While actual dimensions will vary, an optimized version of a photo taken by a standard point-and-shoot camera will have a 2048 x 1536 pixel resolution when pushed to your devices. Panoramic photos can be up to 50 pixels wide.
Seems like it may be some bug with the 'optimization' process for the iPad / AppleTV?  Has anyone seen this before?
Macbook Pro mid 2009, OS X Mountain Lion 10.8.2
iPad 3
AppleTV 2nd gen.

Answer 1

No need to do a screen capture.  The cropped image in photostream on the iPad can be exported to the mac.  I ran some samples tonight. Pardon the content of the pic - it is a greeting card... no one i know.
Scanned B&W and Color, in 3 resolutions:  150, 300, 600 dpi.
I now see that the limits in attaching pics here is pretty restrictive, so i've put them into a smugmug album:
http://daveyeager.smugmug.com/Other/Apple-photostream-bug/27709278_6Lrgjwhttp://
note that the 150 and to a lesser extent, 300 dpi B&W scans are cropped (filenames are at the bottom of the image in the center), but all color scans look correct.
The process was...
scan on a Canon MX892 printer/scanner using Mac Image Capture in Mountain Lion,
import the files into iPhoto on the Mac,
put into photostream from iPhoto,
go to the iPad and export them from iPhoto / photostream as files to iTunes,
attach iPad to Mac to transfer the files to the Mac,
upload to Smugmug.  (sounds worse than it is)