When the connection to my iBlue 747 starts having timeouts, pressing "disconnect" freezes BT747. No response to anything except "force quit" (or a kill command), and even then the app will not disappear from the dock or open apps:
$ ps -A | grep 747
335 ?? E 0:00.00 (BT747 Desktop Au)
Using bluetooth connection on Mac OS X.4, Auto Update version. Bluetooth icon indicates an active connection.