diff --git a/Subsurface/Source/Characters/CharacterInfo.cs b/Subsurface/Source/Characters/CharacterInfo.cs
index 39cdcdf3b..a789df893 100644
--- a/Subsurface/Source/Characters/CharacterInfo.cs
+++ b/Subsurface/Source/Characters/CharacterInfo.cs
@@ -184,6 +184,7 @@ namespace Barotrauma
                 spritePath = spritePath.Replace("[GENDER]", (this.gender == Gender.Female) ? "f" : "");
                 spritePath = spritePath.Replace("[HEADID]", HeadSpriteId.ToString());
 
+                ToolBox.IsProperFilenameCase(spritePath);
                 string fileName = Path.GetFileNameWithoutExtension(spritePath);
 
                 //go through the files in the directory to find a matching sprite
diff --git a/Subsurface/Source/DebugConsole.cs b/Subsurface/Source/DebugConsole.cs
index 16083a694..42554ccd6 100644
--- a/Subsurface/Source/DebugConsole.cs
+++ b/Subsurface/Source/DebugConsole.cs
@@ -748,6 +748,8 @@ namespace Barotrauma
                         DebugConsole.ThrowError("TutorialSub.sub not found!");
                     }
 
+                    break;
+                case "testasd":
                     break;
                 default:
                     NewMessage("Command not found", Color.Red);
diff --git a/Subsurface/Source/GUI/GUIStyle.cs b/Subsurface/Source/GUI/GUIStyle.cs
index ea137a4ab..5fdc59c7d 100644
--- a/Subsurface/Source/GUI/GUIStyle.cs
+++ b/Subsurface/Source/GUI/GUIStyle.cs
@@ -14,7 +14,11 @@ namespace Barotrauma
             componentStyles = new Dictionary<string, GUIComponentStyle>();
 
             XDocument doc;
-            try { doc = XDocument.Load(file); }
+            try
+            {
+                ToolBox.IsProperFilenameCase(file);
+                doc = XDocument.Load(file);
+            }
             catch (Exception e)
             {
                 DebugConsole.ThrowError("Loading style \"" + file + "\" failed", e);
diff --git a/Subsurface/Source/Map/Submarine.cs b/Subsurface/Source/Map/Submarine.cs
index de045b928..bf2ba494f 100644
--- a/Subsurface/Source/Map/Submarine.cs
+++ b/Subsurface/Source/Map/Submarine.cs
@@ -973,6 +973,7 @@ namespace Barotrauma
             {
                 try
                 {
+                    ToolBox.IsProperFilenameCase(file);
                     doc = XDocument.Load(file);
                 }
 
diff --git a/Subsurface/Source/Utils/ToolBox.cs b/Subsurface/Source/Utils/ToolBox.cs
index 30cffdc35..101f2dd00 100644
--- a/Subsurface/Source/Utils/ToolBox.cs
+++ b/Subsurface/Source/Utils/ToolBox.cs
@@ -27,11 +27,55 @@ namespace Barotrauma
 
     public static class ToolBox
     {
+        public static bool IsProperFilenameCase(string filename)
+        {
+            char[] delimiters = { '/','\\' };
+            string[] subDirs = filename.Split(delimiters);
+            string originalFilename = filename;
+            filename = "";
+
+            for (int i=0;i<subDirs.Length-1;i++)
+            {
+                filename += subDirs[i] + "/";
+                
+                if (i == subDirs.Length - 2)
+                {
+                    string[] filePaths = Directory.GetFiles(filename);
+                    if (filePaths.Any(s => s.Equals(filename + subDirs[i + 1], StringComparison.Ordinal)))
+                    {
+                        return true;
+                    }
+                    else if (filePaths.Any(s => s.Equals(filename + subDirs[i + 1], StringComparison.OrdinalIgnoreCase)))
+                    {
+                        DebugConsole.ThrowError(originalFilename + " has incorrect case!");
+                        return false;
+                    }
+                }
+
+                string[] dirPaths = Directory.GetDirectories(filename);
+
+                if (!dirPaths.Any(s => s.Equals(filename+subDirs[i+1],StringComparison.Ordinal)))
+                {
+                    if (dirPaths.Any(s => s.Equals(filename + subDirs[i + 1], StringComparison.OrdinalIgnoreCase)))
+                    {
+                        DebugConsole.ThrowError(originalFilename + " has incorrect case!");
+                    }
+                    else
+                    {
+                        DebugConsole.ThrowError(originalFilename + " doesn't exist!");
+                    }
+                    return false;
+                }
+            }
+            return true;
+        }
+
         public static XDocument TryLoadXml(string filePath)
         {
             XDocument doc;
             try
             {
+                IsProperFilenameCase(filePath);
                 doc = XDocument.Load(filePath);
             }
             catch (Exception e)