Ghost Site shader ATI issue

[GoogleFrog]

People with ATI get this error

[f=0001168] Vertex shader failed to compile with the following errors:
ERROR: 0:18: error(#164) l-value required: assign "gl_Vertex" (can't modify an input)
ERROR: 0:19: error(#164) l-value required: assign "gl_Vertex" (can't modify an input)
ERROR: 0:28: error(#164) l-value required: assign "gl_Vertex" (can't modify an input)
ERROR: 0:29: error(#164) l-value required: assign "gl_Vertex" (can't modify an input)
ERROR: 0:31: error(#164) l-value required: assign "gl_Vertex" (can't modify an input)
ERROR: 0:34: error(#164) l-value required: assign "gl_Vertex" (can't modify an input)
ERROR: error(#273) 6 compilation errors. No code generated

[GoogleFrog]

infolog(1).zip
Here is a zip of the infolog because it is large.

[GoogleFrog]

I reverted the change to Ghost Site to enable further testing.
8eb7d31

[dvr333]

Why is it always ATI?!

Who on the dev team even has an ATI card? I don't, so I need someone else to test new shader code PRs for any ATI problems.

[GoogleFrog]

KingRaptor and Licho have ATI I think. You should be able to get KingRaptor to test.

[GoogleFrog]

Edge extension has been fixed. Reopen or make a more useful ticket if Ghost Site is broken.