Box type: DM7025, 2 * CU1216Mk3 (DVB-C)
GUI (enigma1/enigma2): enigma2
Firmware version: 20070326 + dreambox-dvb-modules_2.6.12.6-20070826-gcc4.1-r0_dm7025.ipk

Since I bought a DM7025 about a month ago I've had this problem with every channel of this one mux on Sonera cable-tv in Finland. Picture stalls periodicly and sometimes the audio has nasty clicks, if it gets bad enough the box shows "tuning failed" messages.

The mux in question is at 170MHz, symbol rate 6900k, QAM-128. Other muxes at 162MHz and 354MHz with same parameters work perfectly.

SNR and AGC are about 96 and 40 for every mux. Channels on the problem mux show BER errors for a moment before the picture and/or audio fails, and then BER returns to 0, other muxes have a steady BER 0.

The newer dvb-modules make no difference. A Humax box has no problems at all.