Your thinking is my thinking. An intake manifold gasket leak is what I am guessing. I am careful when I pour, I use a big funnel, and I haven't spilled any oil under the hood in some time. And since I have been doing this since I bought my VX, I am sure its not from me spilling. This dribble, although slight, seems to be coming from a consistent source. I will take photos soon.
Bart