Yasu has been updated to v1.3.1. This update is only available for Mac OS X 10.4 and fixes “an issue that would result in an AppleScript error if a user closed the main window and then tried to open the preference sheet via menu selection. The correct behavior is for Yasu to quit if the main window is closed.” Yasu v1.0.3 is still aviailable for users of Mac OS X 10.2-10.3. Read the Favored Freeware entry for Yasu here.