First, I'm totally happy with Espionage. It's exactly what I've been looking for. Yea! No more FileVault mess.
My question is about the built-in backup feature of Espionage. I went through the forum post about correctly excluding things from Time Machine. That's fine. And I've setup the built-in Espionage backup to backup all of my encrypted folders to an external hard drive; upon unlocking and every hour while unlocked.
I'm surprised that it can backup the sparsebundle / sparseimage while that disk image is mounted. I thought that once a disk image was mounted you really couldn't (shouldn't?) mess with the underlying image file. I guess I'm mistaken since this seems to be how you're backing up the data. Any caveats? Or does it really produce a clean backup every hour while in use?
Thanks!
Mike