Yes this is strange.
Did you actually download it from the Main Screen...
Go to "Account Management, System Activation, PS3 System, Game". After that see if you can download the DLC from the playstation store. Or you could create a new account and try to download it again. That would help you figure out if the problem is with your psn acct.
Also, I received the game in Oct 2012, and the most current version (2.01xxx...) is installed.
What region is your game disc? In what country is your PSN account registered?Yeah, I'm not sure what else to say. I'm in the U.S., so there should be no regional issues, I only use one account on my PS3
As soon as you do this, any GT5 DLC activation keys you've downloaded are wiped.I've re-installed GT5
As soon as you do this, any GT5 DLC activation keys you've downloaded are wiped.