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Don't go popping that cork off the champagne bottle yet now that PSJailbreak is out. Reports say that there is a chance for the PS3 to detect the jailbreak and thus, consequently, get your PSN account banned, similar to how the XBL does it.

According to SKFU and RichDevX, while you are logged into PSN, the Backup manager game ID (LAUN-12345) could be logged or recorded by Sony. This could then allow Sony to see if you are using the PSJailbreak/clone. As it is, Sony actually does impose bans on both PSN accounts and PS3 systems, resulting to the 800A227 error code.

So if you want to steer clear of trouble with Sony while still enjoying PSjb, it probably would be best if you don't go online and play first to avoid detection.