Apple’s developer betas of future versions of iOS are just that, betas, which means that there’s all sorts of problems that can come up when you install one. Total device meltdown, though? That’s the sort of thing that ought to be ironed out in alpha, yet that’s just what at least one iOS 5 Beta user is reporting after installing the dev preview on his iPad: massive, device crippling overheating issues. And Apple says it’s a known issue.
iPad Undergoes Meltdown After Installing iOS 5 Beta