I am running Firebird 1.5 rc3 and one of the databases I use just died.

It has been working fine up till now when all I get is "database.fdb is
not a valid database".

isql, gbak, and gfix all just started giving me this error. Anyone know
a way to fix it or how it could have happened?

If I look at a copy of the file in wordpad I can see all the data and
what not, are there any known viruses that attack 'fdb' files?

Thanks
Jason Hunter