If you happen to use DropBox service, you might want to download the latest version 1.2.0 which should fix security vulnerabilities found by Derek Newton described in H-Online.
Here are the changes in the latest 1.2.0 version:
- Security enhancements, an attacker will not be able to steal your computer's account credentials just by copying configuration files to another machine.
- New encrypted database format to prevent unauthorized access to local Dropbox client database.
- Other small fixes
- Continued 10.7 support
They have released an update for Windows, Mac, and Linux version.