Index: binary-improvements/MapRendering/Web/Handlers/ItemIconHandler.cs
===================================================================
--- binary-improvements/MapRendering/Web/Handlers/ItemIconHandler.cs	(revision 292)
+++ binary-improvements/MapRendering/Web/Handlers/ItemIconHandler.cs	(revision 306)
@@ -152,5 +152,5 @@
 
 		private void AddIcon (string _name, Texture2D _tex, Dictionary<string, List<Color>> _tintedIcons) {
-			icons.Add (_name + "__FFFFFF", _tex.EncodeToPNG ());
+			icons [_name + "__FFFFFF"] = _tex.EncodeToPNG ();
 
 			if (_tintedIcons.ContainsKey (_name)) {
@@ -166,5 +166,5 @@
 						}
 
-						icons.Add (tintedName, tintedTex.EncodeToPNG ());
+						icons [tintedName] = tintedTex.EncodeToPNG ();
 
 						UnityEngine.Object.Destroy (tintedTex);