I got a spyder 3 pro and calibrated my monitor and sent some pictures of to be printed at digital works. Overall they look great, the colours are spot on etc. Only thing is some of them turned out to be quite a bit darker than they appear on my screen, even with the brightness setting turned right down to 0 and after numerous re-cals.

What can I do to fix this? The monitor is nothing special, it's a Hanns G 22" lcd.