Well, the SD corruption bug happens on perfectly good SDs.. like the internal (non-removeable!) memory card Nokia bundled with the N810. Mine did a write error when writing out a backup, which was rather catastrophic, and a quick search of the forum shows that it happened to quite a few people. All with brand-new N810s. In all cases, once you manage to reformat the offending card (after fsck-ing and getting as much data out as possible), the hardware is perfectly fine.