diff --git a/Bizware/BizHawk.Bizware.BizwareGL.SlimDX/IGL_SlimDX9.cs b/Bizware/BizHawk.Bizware.BizwareGL.SlimDX/IGL_SlimDX9.cs
index 95c8f62722..58a70b07db 100644
--- a/Bizware/BizHawk.Bizware.BizwareGL.SlimDX/IGL_SlimDX9.cs
+++ b/Bizware/BizHawk.Bizware.BizwareGL.SlimDX/IGL_SlimDX9.cs
@@ -191,7 +191,10 @@ namespace BizHawk.Bizware.BizwareGL.Drivers.SlimDX
 					string profile = "ps_1_0";
 					if (cg)
 						profile = "ps_3_0"; //todo - smarter logic somehow
-					bytecode = d3d9.ShaderBytecode.Compile(source, null, null, entry, profile, ShaderFlags.EnableBackwardsCompatibility, out errors);
+
+					//ShaderFlags.EnableBackwardsCompatibility - used this once upon a time (please leave a note about why)
+					//
+					bytecode = d3d9.ShaderBytecode.Compile(source, null, null, entry, profile, ShaderFlags.UseLegacyD3DX9_31Dll, out errors);
 				}
 				catch (Exception ex)
 				{
diff --git a/Bizware/BizHawk.Bizware.BizwareGL/GuiRenderer.cs b/Bizware/BizHawk.Bizware.BizwareGL/GuiRenderer.cs
index a634a5ad98..637101e054 100644
--- a/Bizware/BizHawk.Bizware.BizwareGL/GuiRenderer.cs
+++ b/Bizware/BizHawk.Bizware.BizwareGL/GuiRenderer.cs
@@ -375,13 +375,13 @@ struct VS_OUTPUT
 {
 	float4 vPosition : POSITION;
 	float2 vTexcoord0 : TEXCOORD0;
-	float4 vCornerColor : TEXCOORD1;
+	float4 vCornerColor : COLOR0;
 };
 
 struct PS_INPUT
 {
 	float2 vTexcoord0 : TEXCOORD0;
-	float4 vCornerColor : TEXCOORD1;
+	float4 vCornerColor : COLOR0;
 };
 
 VS_OUTPUT vsmain(VS_INPUT src)
diff --git a/Bizware/BizHawk.Bizware.BizwareGL/RetroShader.cs b/Bizware/BizHawk.Bizware.BizwareGL/RetroShader.cs
index 7a0d32ac8c..497d995a72 100644
--- a/Bizware/BizHawk.Bizware.BizwareGL/RetroShader.cs
+++ b/Bizware/BizHawk.Bizware.BizwareGL/RetroShader.cs
@@ -20,8 +20,9 @@ namespace BizHawk.Bizware.BizwareGL
 			Owner = owner;
 
 			VertexLayout = owner.CreateVertexLayout();
-			VertexLayout.DefineVertexAttribute("position", 0, 4, VertexAttribPointerType.Float, AttributeUsage.Position, false, 24, 0);
-			VertexLayout.DefineVertexAttribute("texCoord1", 1, 2, VertexAttribPointerType.Float, AttributeUsage.Texcoord0, false, 24, 16);
+			VertexLayout.DefineVertexAttribute("position", 0, 4, VertexAttribPointerType.Float, AttributeUsage.Position, false, 40, 0);
+			VertexLayout.DefineVertexAttribute("color", 1, 4, VertexAttribPointerType.Float, AttributeUsage.Color0, false, 40, 16); //just dead weight, i have no idea why this is here. but some old HLSL compilers (used in bizhawk for various reasons) will want it to exist here since it exists in the vertex shader
+			VertexLayout.DefineVertexAttribute("texCoord1", 2, 2, VertexAttribPointerType.Float, AttributeUsage.Texcoord0, false, 40, 32);
 			VertexLayout.Close();
 
 			string defines = "#define TEXCOORD TEXCOORD0\r\n"; //maybe not safe..
@@ -106,15 +107,19 @@ namespace BizHawk.Bizware.BizwareGL
 			float v0,v1;
 			if (flip) { v0 = 1; v1 = 0; }
 			else { v0 = 0; v1 = 1; }
-			float* pData = stackalloc float[8*4];
+			float* pData = stackalloc float[10*4];
 			int i=0;
 			pData[i++] = 0; pData[i++] = 0; pData[i++] = 0; pData[i++] = 1; //topleft vert
+			pData[i++] = 0; pData[i++] = 0; pData[i++] = 0; pData[i++] = 0; //useless color
 			pData[i++] = 0; pData[i++] = v0;
 			pData[i++] = w; pData[i++] = 0; pData[i++] = 0; pData[i++] = 1; //topright vert
+			pData[i++] = 0; pData[i++] = 0; pData[i++] = 0; pData[i++] = 0; //useless color
 			pData[i++] = 1; pData[i++] = v0;
 			pData[i++] = 0; pData[i++] = h; pData[i++] = 0; pData[i++] = 1; //bottomleft vert
+			pData[i++] = 0; pData[i++] = 0; pData[i++] = 0; pData[i++] = 0; //useless color
 			pData[i++] = 0; pData[i++] = v1;
 			pData[i++] = w; pData[i++] = h; pData[i++] = 0; pData[i++] = 1; //bottomright vert
+			pData[i++] = 0; pData[i++] = 0; pData[i++] = 0; pData[i++] = 0; //useless color
 			pData[i++] = 1; pData[i++] = v1;
 
 			Owner.SetBlendState(Owner.BlendNoneCopy);