This is the same problem I have with my JP version (which I posted
here), which I have always been careful to update first. I noticed that when I played it after updating this last time, and before updating my NA version, searches failed and every other PC came up without a name and as the same basic hume model. NA version plays fine after updating. I ran File Checks on both versions and no problem was detected in either sets of all 23,444 files. I, too, suspect there's something which messed things up in the latest update.