Sony has confirmed that there are some problems with Grand Theft Auto IV on the PlayStation 3. They say they're working with Rockstar to fix the issue, although no time frame was mentioned.
Yes, we are aware of what the message boards and a few of the industry blogs are saying about a 'freezing' issue with GTA IV on a limited number of PS3s. Although we have seen an extremely low volume of contacts to our customer service department regarding such an issue, we want to ensure that every consumer has a great experience on our console and with GTA IV. All parties involved are working to isolate the problem for those few units and identify a solution.
Here's hoping a fix is found soon!