[Editor's note: There's another thread with a different solution to this problem that involves closing your PPP connection before quitting. I felt this one was different enough to merit separate a separate thread.]
With certain ipfw firewall configurations and dialup connections there is a long delay when quitting Entourage v.X. By blocking remote ports 49000-50000and local ports 3000-4000 this delay is gone (the ports can probably be narrowed down). This can be done by the shell command (as user root)
ipfw 10000 add deny tcp from any 49000-50000NOTE: Shown on two lines; enter as one!
to any 3000-4000 out xmit ppp0
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http://hints.macworld.com/article.php?story=20011214015927981