Photoshop CS5 no longer writes certain metadata when saving images to JPG / JPEG files, and when using these jpg files in a Pure Player environment, the image is not displayed.
Here's is a snippet on why jpg files are different from link to this thread:
"Leaving out the obsolete metadata means that Photoshop JPEGs are now EXIF compliant and work with more devices and applications than they used to."
"Nothing to fix in Photoshop - but your other app has a problem reading metadata that needs to be fixed."
http://forums.adobe.com/message/2977759
