I have a strange problem with Bluetooth and wireless input devices. I have set up Apple wireless keyboard and mouse, and also ticked "Show Bluetooth status in the menu bar" in Bluetooth preferences. However, after I reboot bluetooth icon disappears from the menu bar, and Magic Mouse prefs revert to defaults.
Apart from that, I am not able to tick "Allow Bluetooth devices wake up this computer" in Preferences – Bluetooth – Advanced.
What can it possibly be?
Before that I had the same issue with Dock (its icons would return to a certain state every time after reboot, no matter how I'd change or rearrange them before restarting). I managed to solve Dock issue by trashing Dock .plist files. I guess it may be the same with Bluetooth, but I don't know which .plist to trash this time (tried deleting com.apple.Bluetooth.plist, it doesn't work).