An Introduction to Tiger Terminal
Subject:   Rotating Backgrounds, oh my!
Date:   2005-05-23 17:23:48
From:   norburym
Response to: Rotating Backgrounds, oh my!

The "trick" isn't permanent. Did you try a reboot? I wondered about a typo if you did type the entire command out but I can't see what you "might" have typed that would have caused what you described.
Log in as another user...still happening? Or you could just try dumping the (spotlight it).