What I have and what I've read.

After you have installed GTA 4 on your ps3 + save games, your PS3 can get ''hurted'' by it.

Rockstar say it also.

PS3 crash everytime and you have to reset it but he dont read the new disks. so HE wont read another game like Fifa 08. =\

I got this also. There are already few PS3 died by this.

Rockstar say:'' You have to delete your save game ''

Just be carefull and dont think ur ps3 is broken or what ever