I'm inclined to say Yes.
Leads to some interesting questions, though.
If I'm using Ethereal Jaunt, and someone on the Material Plane casts Dimensional Lock, what happens when my Jaunt wears off?
"When the spell expires, you return to material existence."
But I can't return to material existence while within the bounds of the Lock.
If I subsequently walk to a spot that isn't covered by the Lock, do I immediately pop back to the Material... or did I miss my chance at returning, and I'm no stuck on the Ethereal until I find some other way back... like casting another Ethereal Jaunt and dismissing it outside the bounds of the Lock?
-Hyp.