for chooleen - i also have kworld 399u and it works with this files manually installed from here : usbTuner for all new images :
but now i have experienced another problem on the new icvs image with gp3 :
after the activation of usbtuner the pozitionersetup stop working and the image goes in to reboot.
i have this crash file:
File "/usr/lib/enigma2/python/Plugins/SystemPlugins/PositionerSetup/plugin.py", line 358, in updateStatus
transponderdata = ConvertToHumanReadable(self.tuner.getTransponderData(), "DVB-S")
File "/usr/lib/enigma2/python/Tools/Transponder.py", line 25, in ConvertToHumanReadable
eDVBFrontendParametersSatellite.FEC_9_10 : "9/10"}[tp["fec_inner"]]