I have here the same Problem (no Locks by channel switching by some transponders) with VDR 1.3.38 with DVB-T. Of course I have not so strong DVB-T signal, but with VDR 1.3.37 I have no Problems with channel switching and Locks!! With tests with both VDR versions above I use the same kernel (2.6.15) and DVB driver. Has this anything to do with the following changes? - Improved TS/PES conversion to better handle lost TS packets (thanks to Reinhard Nissl). - The DVB devices now retune (and, if applicable, resend the DiSEqC data) if the lock is lost (based on a patch from Reinhard Nissl). - Fixed handling TS packets in cTS2PES (thanks to Reinhard Nissl). - Any cReceivers still attached to a cDevice when that device switches to a different transponder are now automatically detached (suggested by Patrick Fischer). - Adapted c(Dvb)Device: ProvidesCa() to the dynamic CA handling. - Added a mutex to synchronize cDevice: PlayPesPacket() and SetCurrentAudioTrack() (thanks to Reinhard Nissl). best regards, Juergen Judt