Yep! Fixed a long time ago, closing :)

Sure, I can give this an extra look.

Do you have an example of a node tree that is a common case that should look cleaner?

Ticked this one off a bit prematurely - it has definitely been fixed now in 1.23 :)

SM2.0 has a bunch of weird limitations all over the place. The SM2.0 feature is experimental for that reason, so I'll leave this as-in, given that you got it to work :)

Any errors on build?

This has been fixed in 1.22, which is releasing soon

What error?

This weekend, I'm guessing!

This is fixed in the coming version

Looks like you're missing the node data files. Try doing a clean reinstall of SF like this:
http://acegikmo.com/shaderforge/faq/?Q=erroronnewversion#erroronnewversion