Hello,
I have just applied all updated of F14 including KDE 4.6.1, now kbluetooth won't run anymore, it seems that kbluetooth is incompatible with the new kdelib (ABI change)
$ kbluetooth kbluetooth: symbol lookup error: kbluetooth: undefined symbol: _ZN5Solid7Control16BluetoothManager4selfEv unnamed app(4412): Communication problem with "kbluetooth" , it probably crashed. Error message was: "org.freedesktop.DBus.Error.ServiceUnknown" : " "The name org.kde.kbluetooth was not provided by any .service files" "
It seems that openSuSE users have the same issue:
http://lists.opensuse.org/opensuse/2011-02/msg00003.html