Ed, try switching the SAP position when this occurs.
Occasionally my Fox channel on one of my DTVPalDVRs will play the second audio channel programming and not the main one. Perhaps yours is a similar issue.
Finally got to try that just now. Did it again while watching local Ch 5 news. English-only, nothing else to switch to. But what did bring back the audio was using channel Up and Down with the tuner. Changing channel up and back seems to reset the audio and it starts working.
The schedule data for channels 33-2 and 33-3 are swapped. Earlier I set a timer to record a program this evening on 33-2 and that is still good. But now the schedule shows that the program is on 33-3. Checking the content that is currently on shows that it is only the schedule that has swapped as the content is where it is supposed to be but doesn't match the schedule data. A quick check with other tuners shows that they are showing the correct data for these channels.
I noticed this problem a couple of days ago and performed a warm restart which fixed it. For a while.
Since you're both in DFW it could be a station issue rather than a Pal issue. Can you confirm with another device?
Like I said to begin with, I checked using two other tuners (internal TV and CM7000) which showed the correct data. That doesn't tell me much since the PAL can store guide data for an extended period while the tuners show only what is available at that instant.
The problem appears to be time dependent. At 9PM the data was swapped but at 10PM when my timer started, it got the correct schedule data. 10PM happens to coincide with the 3 hour EPG blocks and their PSIP generator would have changed what it was transmitting then.
It was OK this morning but messed up again this evening. I agree that it is likely a station problem but since I have no way to view the data stream, I can't determine the cause. Although I suspect that the station will have little interest in correcting this problem, I will contact them about it.