Ok… I was designing a credit card for a new client using provided, hi-res photos of a pile of US Currency when I got this error:
After doing a little research, it seems that Photoshop CS has an algorithm built-in that recognizes images of various currency and will prevent you from accessing the image.
My first reaction was “WTF Mate?” 🙂
You can read more about it [url=http://slashdot.org/article.pl?sid=04/01/08/0111228&mode=thread]here.[/url]
To save you all some time, here’s the workaround:
1. Open the banknote image with ImageReady (fortunately, ImageReady does not have the same banknote protection as photoshop)
2. Go to File > Edit in Photoshop
3. Viola. The image loads in Photosohp without being checked.