Thank you so much, really helpful post. I thought I was going crazy when my MightyMouse wasn’t working.

Thanks for the Bluetooth fix solution! Though it’s scary to hear that loud beep when the MacBook is re-starting it did the trick.

Hi, well. I first upgraded to a Leopard Beta version. Then Re-upgraded with a genuene Leopard version. With both some problems where still there.
After the first upgrade, some files on my Windows bootcamp partition wherent accesable via OS X anymore :S. And all kinds of small things also with the battery charger going from green to orange every 2 seconds and back.

But recently I managed to free up enough space on my external drive and completely formatted my whole mac. Reinstalled Leopard from scratch and put back some stuff like ical, itunes library. I didnt use any system settings recovery.
And now everything runs smoothly again. So I think a complete install of Leopard would be better than upgrading 10.4 to 10.5 if you have it running for some while.

Since upgrading to Leopard (and then doing a fresh Leopard install), I’ve had a few issues. The inability to find my wireless access point (both old one and new one) after waking up is annoying, and the inability to format an external disk (without partitioning) was a weird one.

I also thought I was “upgrading” when I overpaid for the Airport Extreme, but it won’t maintain a connection with an “AirDisk” (not sure if it’s Leopard or router) and I have networking collisions/conflicts when running powerline adapters. After CES (when things calm down), I’m ebaying the base station if Apple hasn’t released any new firmware.

Unfortunately that is a common issue that has been around since Apple switched to Intel, and apparently wasn’t fixed with Leopard. I’ve had it happen twice in the last year on my macbook, once shortly after upgrading to Leopard.

You can also solve the issue without a reboot by restarting the bluetooth daemon. Sorry, I don’t have the exact steps handy but you should be able to google it. One of the things I love about OS X (and all *nix/BSD systems) is that an awful lot of issues can be resolved without a reboot.