I’m using the Apple FileVault encryption tool that comes with Leopard as standard. There are a view problems with it.

One of them is: “resetting default applications preferences”. Extensions in Leopard are linked to Applications. The FileVault has a bug. It’s possible to change the extension preference but when restarting all defaults will reset.

Solution

1. Download a program called Lingon.
2. Add a new launchd configuration file.
3. Select when you want to launch the command. (I’ve used at login)
4. Name: <domain>.<yourname>.<application_name>
5. What: /System/Library/Frameworks/CoreServices.framework/ Versions/A/Frameworks/LaunchServices.framework/ Versions/A/Support/lsregister -kill -r -domain local -domain system -domain user >/dev/null 2>&1 &
6. When: Run it when it is loaded by the system (at startup or login)
7. Save, Quit and your done.

Drawback

Every time you restart your machine Leopard is going to ask if you allow that specific program to open your file with.