We have an office where users have roaming profiles. This week, random users, upon logging in, have their Local Settings folder recreated from scratch. They lose everything they had in the old Local Settings folder (most painfully, their archive.pst files). We've seen this in the past, but usually a new Local Settings folder is created, followed by a dot and either our domain name or the date. But in this new case, the old Local Settings folder disappears, and they get a brand new one with nothing in it!
We've changed nothing on the network. Anyone have any idea what would cause this to happen?