The latest driver update for the Sundtek DVB-C/T2 usb tuner causes the device to become a C tuner only.
This happened when I updated ViX from 5.3.011 to 5.3.012 followed by the driver update, and also from 5.3.011 to 5.3.013 and then the driver update.
Attachments should show what happens. The Sundtek Control Centre no longer reboots Enigma 2 after installing the new driver, and everything looks fine in tuner setup until I reboot the box (attachment 3).