well, when I bought it, it was PC-formatted. According to the manual it should have automatically initialized to mac-format when first plugged in a mac.
Now it is recognized as a "A-trash pc-mac exchange ms dos"..
If this doesn't pop your mind..
Anyhow, I tried multiple utilities (springcleaning, Norton antivirus/utils, diskwarrior, canopener...) thay all see it but cannot access it's contents. (only a global view of the folders)
Still waiting for a conclusion :
Micha