I had the bad surprise to find my screen broken. Marks on the case make it pretty obvious the reader was badly hit. And i can't remember when or how that happened. That to say, maybe you reader did took a hit and you didn’t noticed.
Still, if that where the case, screen breakage would be way more likely than a broken soldiering. That's just not good... Soldiering don't break unless badly done or seriously manhandled.