The only time I have ever had an issue with the config file was when I was editing it locally, and I forgot it was opened when I switched between computers and accessed it via my CP and updated it there as well.... when I switched back to my forums (locally) I saved changes and voila everything was wiped and I had to use a backup. Maybe something like this happened, where there were two instances of the config file being written and it burped out a WTH are you doing to me kind of thing.
Dunny
