Perhaps you were trying to install After Effects CS5.5 or some other CS5.5 component on a Mac Mini Server a came up with the a screen full of gibberish that does you no good. Hopefully these 3 things will get you going:

1. Install latest Java OS X Lion Update
2. Enable Root User
3. Boot into safe mode, login as root user, and install

Brought to you by 3 hours of hair pulling.