great landscape

Yeah, shutterstock is a great pain with noise. I run everything through noise software (using an action, so i don't have to sit there and wait for it) no matter what the iso was. The software automatically figures out what ISO the pic was taken at and knows that i am using a canon and figures out waht sort of noise reduction is required (noise ninja as a photoshop plug-in)
HOWEVER that said.., after shutterstock has lapped up all those noiseless images, istock often refuses images because they are over processed with noise reduction software.... go figure.