Not sure if it was this update or the last update but my iMac running Tiger has a different error chime (the sound made when you do something wrong like type an inexistant keyboard shortcut. ex:type apple+J) than when I bought it. I'm sure that it used to be a much lower beep, now its more of a high pitched whir. Am I the only one that has noticed?
In System Preferences, under the Sound pane, you can pick your error sound. Mine is Funk and I'm pretty sure that's the default Tiger sound. I don't remember what it was in Panther.
