It does sound like user error since it is such a low amount. I could see stuff getting stuck in the charging port on the Vita. It is a handheld system. I'll have to make sure that doesn't happen to mine, I wouldn't want a potential fire overnight. If this has anything to do with the hardware itself, maybe if you put the charger in the wrong way it could be more likely to burn up? It doesn't charge your Vita, but since they didn't design it to prevent wrong insertion it fits. If it is a combo of dirty ports and backwards charging there probably would be only 31 cases.
Before the PS3 everyone was nice to me :(








