Bluetooth Hardward not working after 10.5.5 Upgrade

I have a 20' imac G5 (1.8 GHz). I installed 10.5.5 yesterday and after restarting my wireless keyboard wasnt working. I went to the preference panel and clicked on bluetooth but it wouldn't activate indicating that that hardware was no found. Has anyone else had this problem? How do I go back to 10.5.4? I am not using time machine. thanks

I'm having similar problems.
I use a noname USB dongle with my keyboard and cell phone.
Being a USB dongle it can't be powered off, however this is what the menu bar item reports as its status after every restart. This is not the same status it reports when I actually remove the dongle (No Bluetooth device present).
The method to turn it back on works through the Bluetooth File Exchange dialog worked for me, however I'm also experiencing some network issues with Bonjour, so just in case, here's what I did yesterday with my Mac:
- Downloaded the Nokia 5310 iSync plugin from pyxx.org (worked).
- Paired the phone (this added a new network interface, Bluetooth PAN IIRC, so this is why I think they could be related)
Everything worked until last night until I put the computer to sleep. Today when it woke up, the BT module would report as off.
Thanks

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Bluetooth Hardward not working after 10.5.5 Upgrade

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