The update removes Other OS support from Sony. PSN has been 'locked out' for others, and some are even hit with the Yellow Light of Death.
"This service is not available in your country/region," is what some PlayStation 3's are telling PSN users, report a growing number on the US PlayStation forums.
Sony is yet to offer a response to these supposed technical glitches that hit after firmware 3.21 went live. It was introduced to block Other OS support, which the corporate giant likely sees as the cause for the PS3 console getting 'cracked'.
Have you been experiencing trouble since the mandatory update?