Agreed !I believe other photos should be good. Even I have not received any notification for other 2. The one the rejected is for the principal applicant. Once we sent that back, I believe we should get the copr and visa issued. I don't think it is them manually rejecting the photos. It might be the software not accepting the photo when they scan it. As that photo will be on the PR card when they arrive.
did you raise the webform etc again ? Put signed forms, all the other required docs again in the package ?