You can't delete Firmware patches for the PS3, but you can delete game patches through the game data utility.
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Updates and patches are downloaded from the PlayStation network. The PS3 system will automatically update when a new version comes out. Game patches will download when you launch the game, if you have PlayStation Plus your PS3 can be set to automaticly check for patches for games you own and download them in the background.
No
Yes, Sign in as the user you want to delete, then hit triangle over the user, and click delete.
i dont know but i wanted to edit this to delete useless answers
Just delete the mic on your ps3, restart the system and reconnect the headset. I had the same problem and it worked for me. :)