OK, so this is more of a niggle than a real problem but it's curious. Basically I no longer have the ability to turn Bluetooth off on my iBook, in the menu or in system prefs (see attached screenshots). I'm using a D-Link DBT-120 adapter so it's not a big deal (I can just unplug the thing!) Have repaired permissions, restarted, and it wasn't a problem after installing 10.4.3 - this has just developed in the last few days. Any thoughts?