Ni no Kuni: Wrath of the White Witch [BLES01555]

Ah, this is the real error:

Code:

·E 0:00:29.337312 {PPU[0x1000021] Thread (_sys_mixerSurBusReq) [0x00c463b0]} 'sys_mutex_unlock' failed with 0x80010009 : CELL_EPERM
·! 0:00:29.337328 {PPU[0x1000021] Thread (_sys_mixerSurBusReq)} Thread time: 0.000000s (0.000175Gc); Faults: 0 [rsx:0, spu:0];
·E 0:00:29.338298 {PPU[0x1000020] Thread (_sys_MixerChStripMain) [0x00c4d9f0]} 'sys_mutex_unlock' failed with 0x80010009 : CELL_EPERM
·! 0:00:29.338315 {PPU[0x1000020] Thread (_sys_MixerChStripMain)} Thread time: 0.000000s (0.130911Gc); Faults: 0 [rsx:0, spu:0];

Sound mixer thread dies, the game hangs thereafter due to "lost contact" so to speak. Same bug as Demon's Souls and some others... Will be looked into.

This is a synchronization bug. Characteristic for this class of bugs is that they usually happen with a probability, not a certainly. And factors like CPU speed affect the probability. It's therefore possible that it happens all the time for one person, and only once in 10000 hours for someone else.