Wow rockstar thats low...just admit you made the game poorly.

The fact that it works flawlessly on a group of PS3's, and always locks on other groups of PS3's, and it's predictable what group it will work on and what group it will fail on, leads me to believe it's Sony's fault.

I am not a game developer of the PS3, but unless Sony has instructed that code be developed differently to run on different SKU's, now can it not be Sony's fault?

I mean unless Rockstar did something way out of bounds with respect to the rules of development (hacked the OS or something), then they should never be able to produce code that impacts other games. If they do, it's Sony's fault for either not testing it well enough, or making an OS that can be compromised easily.

If all that was happening was GTAIV was locking up, I would probably blame Rockstar.

The fact is that does not exist a clear pattern among the PS3 SKU's,and what about the 360's issues?

Is well know for everyone the programmers mistakes from the Rockstar's guys in the whole franchise,they're always been the same,bugs,glitches,freezes,the main reason for the people's complain is that they delay the game so many times to solve this problems and this is a new generation of systems,very powerful indeed to show this kind of bugs.

As an example of what I mean (and I don't know if this is fact, it's just an example). I have heard that clearing your browser cache can fix some of the issues. If putting something in the browsers cache with GTA4, can effect online play of COD4, that's a bug Sony needs to fix.

Now GTA4 has released a patch that stops it from doing whatever was screwing up other games, but they should not have to worry about how other games work if there's is installed. That's Sony's OS departments job. 

 Too right, look at Bully on the 360, not a huge leap graphically, but look at all the issues it has!

It's not exactly surpising rockstar would say it, doubt any company would blame themselves.

I think there are some examples, but it's usually when a really good fix is ready, so they can take the blame, with minimum PR loss. 

At the very minimum it is Rockstar's fault for not testing it enough, but it is probably Sony's fault also for the reasons TheRealMafoo stated.

360 version doesn't have issues...

Not from what I heard, although they were not as severe. 

my ps3 froze a 2 or 3 times in the first few hours of gameplay. after that it didn't freeze at all.