Oh CIC
I landed at the end of March 2016 and was told by the officer processing me that I'd need to submit new photos. Seeing from this forum the drama this has caused I called CIC and got forms, specs and the address from them to send new photos before they requested - couriered to them at the beginning of April.
I called them today and there seems to have been some issue matching the photos up with my application (or they didn't even bother trying) because they say they sent a request for new photos on the 24th of May, which I DIDN'T receive :

Now off to pay for a third set of photos and courier mail!
Looks like I shall be posing as a visitor when I board the plane back to Canada in August or using my old work permit, then using my COPR at the border. I've seen people say this is no problem but it really isn't my first choice.