I am using PPT 2010 in a photo competition environment. In previous version we could add a picture and it added all of the pixels regardless of the resolution. However, 2010 discards pixels whenever the resolution is higher then 150 ppi. Many of our members have images cropped from scans made at resolutions of 2800 ppi, and 4000 ppi and if cropped to provide a 1400 pixel x 1050 pixel image, PPT 2010 loads this as only a 1/2" x 3/4" image with only 50 x 75 pixels so it cannot be scaled up. Others commonly print their images at 300 ppi and leave that value when then crop to 1400 x 1050 pixels. PPT only discard about half of the pixels in that case but is still gives a distorted image if stretched to full size again.

Can anyone tell me how to prevent this from happening? or detect that it has happened so it can be fixed before the competition?