You likely just need a +/- 0.5 offset before the opacity clip input, or, you're clamping too early somewhere in the chain. In any case, it's a math issue, not really a SF issue!

Yep!

You can set that in SF too, it's the backface culling field

This has now been added to 1.34!

Yep, same here

This has now been fixed in 1.34

Are you sure the SF shader is set up correctly? I can't reproduce this on my end

Duplicate of: http://shaderforge.userecho.com/topics/1314-im-trying-to-download-the-latest-version-133-but-it-keeps-downloading-an-older-one-130/

Make sure you download it through Unity 5.5.0f3 or later, and it should be fine

Which is Saturday, so it'll take a while I'm afraid!