Draconian Guppy, on 31 January 2013 - 20:58, said:
What is the actual size? this normally happens when you scale too small.
It happens to all images with black but in the example it's a 43.35 x 28.9cm image entering a 105x148mm (A6) canvas.
muggerfugger, on 31 January 2013 - 21:01, said:
What is your proof color set at? It's usually what decides the color photoshop shows you.
When you go to save it it could look better due to it saving as a diff color profile
I usually just keep mine on "monitor" so my colors look the sa3me outside of photoshop as they do inside. Anything other profile selected they look odd.

This was my first thought and unfortunately that wasn't the case.
The thing is if I open the image normally, it's fine. If I insert it into a canvas, that's when it cries and the blacks cry.