The InputChannel and Output seem to default to “Color”, even for Vertex, but the actual channel used is Position.
I haven’t seen this. How might I go about reproducing this? How exactly did you create your InputChannel / Output node?
If you add it from the upsidedown menus at the bottom of the editor window, both come in as Color.
Good catch, thanks!
I always press Ctrl+O for Output and missed those. Fixing…
And I always use the right-click menu to create nodes. Sounds like we need more internal testers that aren’t so belligerently set in their ways. 
Question to the Beta:
What should be the default channel when creating InputChannel and Output nodes in Genome?
Right now I have fixed it to use the same code for Output nodes already employed by Ctrl+O / right-click menu.
For InputChannel, Genome will now default to “Position”, unless it is in FACE mode where it defaults to “FaceCenter”.
It could use the settings in the InputChannel rollout and go down the list of channels the way Output does, but I just feel this would be inconsistent since every time you drag an InputChannel from the Depot, you would get a different channel name, and never the one you would expect.
Normally, I hit [I] [C] for Input Channel and then the letter of the channel I want, or I use the SHIFT+letter shortcuts for the major channels, which in Beta 3 have been expanded to adapt somewhat to the current iteration mode:
SHIFT+A = FaceArea / SelectionFromFaceAvg in CFV mode
SHIFT+C = Color
SHIFT+E = FaceElement (except in CFV mode)
SHIFT+F = FaceIndex (Except in CFV mode)
SHIFT+G = SmoothingGroup (except in CFV mode)
SHIFT+I = Index
SHIFT+M = “TextureCoord” (only in CFV mode)
SHIFT+N = Normal / FaceNormal in Face mode
SHIFT+P = Position / FaceCenter in Face mode
SHIFT+S = Selection / FaceSelection in Face mode
SHIFT+V = VertexIndex (except in Face mode)