Here is some testing I did with and without TVGOS, you might try the two soft reboots, and see if things improve.
I still had TVGOS, and I deleted my host channel. I left the DTVPal alone (no resets, no zip code change), but checked three things every day. This went on for nine days.
Did it still have the TV Guide logo?
Did it have the correct clock?
Was the clock grayed out?
From the first day, the clock started drifting about 8 seconds per day. It never did lock on to the PSIP clock.
I lost the TV Guide logo on day 8 when all the listings were gone (others have reported this also).
The clock never ungrayed.
On day 9 (2/5/2013) I did a soft reboot. The clock was still off (after drifting for 8 days it was now over a minute off). I then added my host channel back in, and by the next morning, the TV Guide Logo was back, and the clock was correct.
TVGOS data stopped
Now that TVGOS is gone, my clock was already off 10 seconds in the morning. In the evening I decided to do another soft reset. After the reset the clock was still off, however it was no longer grayed out. Just for fun, I did a second soft reset. This time, when the DTVPal came back up, the clock was correct. Since TVGOS is gone, there is no way to duplicate this, to see if the back to back reboots is what sync'd the clock to the PSIP time.
Clock is still locked to PSIP.
Since the clock was ungrayed I decided to play with it. I bumped it forward about 15 minutes. I wanted to see if it would lock back on to PSIP by itself.
After three days the clock did not lock back onto PSIP, and was still about 15 minutes ahead. Also the clock had drifted about 8 seconds a day, which tells me that manually setting the clock causes it to drift on its own. I did a soft reboot, and just as before the clock did not correct itself with the PSIP clock. I did another soft reboot reboot, and just like on 2/7, the clock was now sync'd with the PSIP clock again.
Clock is still correct.
After losing TVGOS, you should do two back to back soft reboots. To do this, turn on the DTVPal so you can see what it is doing. Once it is on, press and hold the power button for 10 seconds, until both lights on the DTVPal come on. Let it go through the boot up process. Once it comes up and you are watching TV again, do the soft reboot again. Once the DTVPal is back up, the clock will have stopped trying to sync to TVGOS, and should be sync'd to the PSIP time.