My experiences still do not jive with yours.
I watched LOTR and Stargate both in DTS-ES before we all found out about the lack of LFE. Layer change, I spot every time, doesn't matter what the soundtrack is. But the 950 didn't lose the signal lock. If you go back through the other threads, I was very hyper about the 950 losing the lock *during* playing of CDs. So I am very sensitive about that in general. (*Never* had problems with signal lock on the Sony pre/pro I had prior.) But at least with the 47ai and the Denon 3800 with the 950, doesn't seem to happen.
My guess, is that the delay with the layer change on the player you are using is long enough that the 950 *does* lose the signal.
I had even postulated in that other thread, that the 950's "time constant" for maintaining the lock wasn't long enough, because I was losing the lock *in* CDs that I knew ran OK with the Sony with the same exact DVD player. And you're right, switching to a dedicated input with PCM chosen did the trick.
Potential bottom line? If you're looking for an excuse to upgrade your DVD player, this might be it.
[This message has been edited by Kevin C Brown (edited April 07, 2003).]