I think very early on SBS VICELAND HD had the wrong service type (0x01 not 0x19).
Zap to SBS VICELAND HD, then MENU->Information->Service. What does the Service reference show (it should be "1:0:19:326:320:3202:EEEE0000:0:0,0:").
Does yours have 1:0:1:{blah} instead? If so, you need to rescan. Then nuke the existing Viceland HD from your Favourites bouquet, and add the newly scanned entry from Last Scanned back into Favourites,
Cheers
Geoff