Hi there, I'm having a similar problem and I already have the latest version of MacFuse installed. I'm trying to restore a TrueCrypt volume (a 10GB container I created) from a TimeMachine backup. The most recent versions of this file does not mount - I get the above mentioned hdiutil error. Strangely, When I go to my OLDEST time machine back ups - from about 8 months ago, and choose the file there, it mounts fine. SO, something happened to the file along the way as it was being back up and I can't mount the latest version of it. Does anyone have any suggestions for getting this to work? I have tried mounting it on my 10.8.4 and my 10.6.8 systems, and get the same error.
Clicking the "read only" option, and checking the box for "do not mount" seems to load the file in True Crypt as a "hidden" file type, but of course I can't see the contents of the container anywhere because the volume is not mounted. Can anyone help here? Thanks so much - apologies in advance if I missed something obvious!