Updated POF will be required to enter Canada (at the time of landing) whether they have asked for it now or not!!! How much funds are required, its significance etc were posted in the same thread by me earlier! So, start preparing for it now even if you have not received your MR yet...I found this post in this forum, and took the liberty of re-posting it here for the benefit of all. I guess everyone here gave it a miss.
http://www.canadavisa.com/canada-immigration-discussion-board/thoz-who-got-612-months-wait-letter-t103103.0.html;msg1840014#msg1840014