This is a cut/paste from a previous beta I was involved in. In addition to what you see below please remember to send the report to sony when you reboot your PS3 if the option to report your freeze shows up, if you say yes the devs will get the proper information from Sony to work on fixing the issue.
Feel free to use the quote function and use this part below as your template.
Use the following template below to report your bugs here on the forum
LOCATION: For example: In the menu, on the loading screen, in game, while checking my messages
TYPE OF BUG:
FREQUENCY: How often are you seeing this bug? Once an hour? Every match?
Have you tried to reproduce the bug? If so, how reliably can you reproduce it?
Please describe the bug in detail: The more specific you are the better.
If you have an image or video, please link it at the end of your post.