Before someone tells me to google this, i have searched and there is no clear solution to my problem i had my ipod jailbroken to 3.0 by redsn0w and all apps worked fine. Today, i jailbroke to 3.1.2 with blackra1n. suddenly, all my appstore apps couldn't run anymore. the ones installed from cydia like the emulator and terminal were ok but no app store ones worked. i tried downloading on my ipod and i tried syncing them from itunes. neither worked. i have heard som stuff about permissions but i really feel that there is no real tutorial or solution so if anyone can come up with a step by step fix, it will be greatly appreciated.