I have a few Truecrypt volumes in an external hard drive (NTFS). I mount and use these volumes to backup the internal hard drive. The corresponding internal hard drive volumes are in the W7 partition (NTFS). most of the time using Linux. Recently, I looked at the "properties" of one of these volumes (from Linux) and it says the "file type" is something like "MATHLAB script (text)". The "file type" of the other TC volumes show as something like "unknown (octet stream". Does anybody have any idea why Linux would start to see this volume as a "MATHLAB script (text)"? The volume appears to mount properly, at least in Linux. By the way, I don't have MATHLAB installed on any of my computers, and I didn't even know what it was until today.