Maybe double-check to make sure your keyboard wasn't changed in software? That's happened once or twice to me, and I'm suddenly typing French, funky accents and all. I dunno, maybe in some region, their keyboards' have instant kill buttons on them, which use the same number code as our tab?
__________________ i7 2600K | ASUS Maximus IV GENE-Z | GTX Titan | Corsair DDR3-2133
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