Version:            (using KDE 4.1.3)
OS:                Linux
Installed from:    Fedora RPMs

Bluetooth service can be started normally.
When I run kbluetooth4 nothing happens. No bluetooth icon appears on system tray. System is not discoverable or connectable via blutooth. When I run kbluetooth4-inputwizard from the console I get the following error:

process 3668: arguments to dbus_message_new_method_call() were incorrect, assertion "path != NULL" failed in file dbus-message.c line 1070.
This is normally a bug in some application using the D-Bus library.
  D-Bus not built with -rdynamic so unable to print a backtrace
KCrash: Application 'kbluetooth4-inputwizard' crashing...
sock_file=/home/enhering/.kde/socket-om/kdeinit4__0
kbluetooth4-wizard(3667): Communication problem with  "kbluetooth4-wizard" , it probably crashed.
Error message was:  "org.freedesktop.DBus.Error.NoReply" : " "Message did not receive a reply (timeout by message bus)" "

And the following pops up on the bug report program:

Application: KBluetooth4 - The KDE4 Bluetooth Framework (kbluetooth4-inputwizard), signal SIGABRT
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[Thread debugging using libthread_db enabled]
[New Thread 0xb8036770 (LWP 3668)]
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[KCrash handler]
#6  0x00110416 in __kernel_vsyscall ()
#7  0x00424460 in raise () from /lib/libc.so.6
#8  0x00425e28 in abort () from /lib/libc.so.6
#9  0x009afa05 in ?? () from /lib/libdbus-1.so.3
#10 0x009ab419 in ?? () from /lib/libdbus-1.so.3
#11 0x0099ef6e in dbus_message_new_method_call () from /lib/libdbus-1.so.3
#12 0x0033d874 in ?? () from /usr/lib/libQtDBus.so.4
#13 0x003396fb in ?? () from /usr/lib/libQtDBus.so.4
#14 0x0033a653 in ?? () from /usr/lib/libQtDBus.so.4
#15 0x00346b3f in ?? () from /usr/lib/libQtDBus.so.4
#16 0x00346c3f in QDBusInterface::QDBusInterface ()
   from /usr/lib/libQtDBus.so.4
#17 0x00e0508a in BluezBluetoothInterface::BluezBluetoothInterface ()
   from /usr/lib/kde4/solid_bluez.so
#18 0x00dff414 in BluezBluetoothManager::createInterface ()
   from /usr/lib/kde4/solid_bluez.so
#19 0x009e8a9e in ?? () from /usr/lib/libsolidcontrol.so.4
#20 0x009e8e8a in Solid::Control::BluetoothManager::findBluetoothInterface ()
   from /usr/lib/libsolidcontrol.so.4
#21 0x009e5fbb in Solid::Control::BluetoothInterface::BluetoothInterface ()
   from /usr/lib/libsolidcontrol.so.4
#22 0x0804f1a4 in _start ()