I submitted a ticket to Rockstar for this issue, what I said below:

I have purchased 3 copies of your game, never frozen ever, and since 1.11 update, all 3 are constantly freezing, i have over 600 ps3 games and not one has ever frozen. Steps I have done myself

This problem is with the patch 1.11 something is causing ps3s to lock up while playing it, this can damage people's hardware it makes me have to restore my file system everytime. If i were you I would acknowledge it and say you are aware and researching the issue, before it damages too many ps3s.