This is a thread on pr card photo request:
http://www.canadavisa.com/canada-immigration-discussion-board/threads/request-new-photographs-for-pr-card-after-landing-add-your-case-here.369480/page-42
I recently linked it.. I tried everyday with different combinations.. nothing worked.. Landed June 7th. Photo retake request Aug 2nd. Photos received by CIC 10th Aug. able to link my application only september last week!
Very frustrating .. I had my photos taken by a professional photographer and made sure all specifications were met! It is unbelievable. Now losing all employment opportunities, because of this damn thing. It is so ironic but now I just wish I was on a work permit! Sorry about the rant.
Had the same situation. Tried all UCI, DOB etc combinations, nothing worked out. Kept trying it every few days, finally I linked it on the last week of September! Landed on 7th June 2017.
Called them today, the agent said they are still processing July 27th. Very frustrating to think about the economic and lost job opportunity because of this stupid thing.