Hi Waynebrown,
Yes, yashshah0809 above submitted his application online and got approved. There's nothing to worry about as long as you submit the right documents: letter of explanation (explain why you're extending and why you're applying online), old passport copies, previous study and work permits, educational documents (I combined my transcript, diploma, and completion of studies letter, and uploaded them under "completion of studies"). Also see yashshah's post below:
"After doing thorough online research and speaking to CIC agent, I submitted an online application for PGWP Extension due to passport expiry. I submitted my application on July 6, 2016 and received a positive response on July 21, 2016 receiving the pending 2 years + of the 3 years.
So all you need to do to apply is:
Fill out the questionnaire in the same manner as you would have done it for the initial PGWP application.
Add a letter of explanation with your current work permit, old passport and other educational documents.
Also attach your new passport and fill up the IMM form in the similar fashion.
Only in the section "Have you previously applied to remain in Canada", you need to write an explanation mentioning Work Permit was issued till passport expiry, have renewed my passport for further extensions.
Let me know if you have any questions."
Thanks