The node guide has now been updated with keyboard shortcuts :)

http://acegikmo.com/shaderforge/nodes/

I hope your dream will come true soon!

Oh, it hasn't been implemented yet (I'm not sure where you saw that it was)

Cool! And yeah, it's annoying, but there's not much I can do about that apart from making it easier to set the texture name to MainTex, which is a planned feature :)

Ah! Right, that's undocumented at the moment. I will add that later :)

Whoops!
Looks like Spherical Harmonics / Light probes were accidentally on in the refraction shader, for some reason. It should resolve itself just by turning light probes off.

Strange though - the issue should have been there before too, I suspect something might have changed for the worse

There is a readme.txt included in the package, which has a list of all the hotkeys :)
Ctrl+C/V/X/D are currently broken on Windows though, which is a known issue

I just wanted to let you know that the first compile error has now been fixed in 0.19 :)