Apple released a Bluetooth Firmware Update for Mac OS X 10.4.3 which improves Bluetooth performance and reliability issues. The Update is available via Software Update and also as a standalone installer.
The Bluetooth Firmware Updater supports D-Link USB Adapters and Apple internal Bluetooth modules on the following CPUs:
* iMac G4 (Gooseneck)
* 12" Titanium PowerBook
* 15" Titanium PowerBook
* iMac G5
* Mac Mini