Petzl has issued a recall for replacement on the 2011 GRIGRI 2
Petzl's GriGri 2 recall concerns GRIGRI 2's (D14 2O, D14 2G, D14 2B ) with the first five digits of the serial number between 10326 and 11136.
From the Petzl website:
"Petzl has discovered that exerting excessive force on the fully extended handle of the GRIGRI 2 can cause internal damage, such that the GRIGRI 2 handle may become stuck in the open position." Read more here: http://www.petzl.com/security/sport/recall-grigri-2?language=en#.VJUIqsBA
You can read the CPSC's recall page here:
If you have the original GriGri, do you need to upgrade to the GriGri 2? If you do a lot of leading on 8.9-9.9mm ropes or just want the latest and greatest gear, get the GriGri 2. If you climb on 10mm or thicker ropes, you can probably hold off on the upgrade until your GriGri wears out. If you mainly toprope in the gym, the original GriGri is just fine and may even be better since it works better with ropes thicker than 10 mm. Both devices handle about the same but the GriGri 2 is lighter, less bulky, and allows you to use thinner ropes.