That error has something to do with kerberos. Part of it's security is based on timestamps (http://tldp.org/HOWTO/Kerberos-Infrastr ... -sync.html
). But I guess the Lacie guys already told you. I'm not enough into kerberos to know of other ways to get this error. I guess some configuration file or maybe even a binary on the box got damaged.
The advice to send the disks to Seagate is ridiculous. Unless there is something you didn't tell, the disks and their data are perfectly healthy, and not subject to data recovery. Just assemble the array and mount it.
You don't specify which box you have. I don't think it's the 5Big, as they are well over their warranty, so I guess Lacie wouldn't put that much effort in it. If it's a 5Big2, you could use the fvdw console to get the data off the box. If it's a new, Intel based box I don't know a quick way.
When you are willing to loose your data you could try a factory reset. Depending on where the damaged file exactly resides this could solve the whole problem.