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I have tried switching my "User Agents" and I have been able to get onto "PS3 Sites" Below are the two "User Agents" you might need. I use firefox and there is an add-on called "User Agent Switcher". Below are the two you might need to use.
andCode:Sony-HTTPClient/1.0 [PS3 test]Try one if it doesnt work try the other.Code:Mozilla/5.0 (PLAYSTATION 3; 1.00)