diff --git a/MainWindow.cs b/MainWindow.cs
--- a/MainWindow.cs
+++ b/MainWindow.cs
@@ -106,9 +106,11 @@ public partial class MainWindow : Gtk.Wi
 		rootWindow = Gdk.Global.DefaultRootWindow;
 
 		// get its width and height
-        int screenWidth;
-        int screenHeight;
-		rootWindow.GetSize(out screenWidth, out screenHeight);
+        int detectedScreenWidth;
+        int detectedScreenHeight;
+		rootWindow.GetSize(out detectedScreenWidth, out detectedScreenHeight);
+        int screenWidth = detectedScreenWidth;
+        int screenHeight = detectedScreenHeight;
         int pixelMultiplier = 1;
 
         if ( DesertPaintLab.AppSettings.Load() == true )
@@ -123,6 +125,8 @@ public partial class MainWindow : Gtk.Wi
         this.DebugAction.Visible = enableDebugMenu;
 
 		ScreenCheckDialog screenCheckDialog = new ScreenCheckDialog();
+        // TODO: screenCheckDialog.DetectedWidth = detectedScreenWidth;
+        // TODO: screenCheckDialog.DetectedHeight = detectedScreenHeight;
 		screenCheckDialog.ScreenWidth = screenWidth;
 		screenCheckDialog.ScreenHeight = screenHeight;
         screenCheckDialog.GamePixelWidth = pixelMultiplier;
diff --git a/ReactionRecorder.cs b/ReactionRecorder.cs
--- a/ReactionRecorder.cs
+++ b/ReactionRecorder.cs
@@ -190,8 +190,13 @@ namespace DesertPaintLab
 
         unsafe private bool IsPossibleSwatchUpperLeft(byte* pixBytes, int x, int y, int stride)
         {
-            int testPixelStart = (y * stride) + (x * 3);
-
+            int testPixelStart = (y * stride) + (x * 3);
+
+            if (testPixelStart < stride)
+            {
+                return false;
+            }
+
             bool result = true;
             // test the left edge for dark pixels
             int i = 0;
@@ -200,15 +205,36 @@ namespace DesertPaintLab
                 int otherPixelStart = testPixelStart + (stride * i);
                 result &= IsDarkPixel(pixBytes[otherPixelStart], pixBytes[otherPixelStart+1], pixBytes[otherPixelStart+2]);
             }
+            if (!result)
+            {
+                // No dark border on the left side
+                // WriteLog("Failed to find left border for swatch at {0}, {1}", x, y);
+                return false;
+            }
 
             // test the dark top border and for papyrus above and below the swatch
+            bool borderError = false;
             int papyErrorCount = 0;
             for (i = 0; result && (i < swatchWidth); ++i)
             {
                 int otherPixelStart = testPixelStart + (3 * i);
-                result &= IsDarkPixel(pixBytes[otherPixelStart], pixBytes[otherPixelStart+1], pixBytes[otherPixelStart+2]);
-                otherPixelStart = otherPixelStart - stride;
-                papyErrorCount += (IsPapyTexture(pixBytes[otherPixelStart], pixBytes[otherPixelStart+1], pixBytes[otherPixelStart+2]) ? 0 : 1);
+                bool isBorder = IsDarkPixel(pixBytes[otherPixelStart], pixBytes[otherPixelStart+1], pixBytes[otherPixelStart+2]);
+                result &= isBorder;
+                if (!isBorder)
+                {
+                    borderError = true;
+                }
+                if (otherPixelStart >= stride)
+                {
+                    otherPixelStart = otherPixelStart - stride;
+                    papyErrorCount += (IsPapyTexture(pixBytes[otherPixelStart], pixBytes[otherPixelStart + 1], pixBytes[otherPixelStart + 2]) ? 0 : 1);
+                }
+                else
+                {
+                    papyErrorCount++;
+                }
+
+                // Checking along the bottom of the swatch - 
                 otherPixelStart = testPixelStart + (stride * swatchHeight) + (3 * i);
                 papyErrorCount += (IsPapyTexture(pixBytes[otherPixelStart], pixBytes[otherPixelStart+1], pixBytes[otherPixelStart+2]) ? 0 : 1);
             }
@@ -216,7 +242,10 @@ namespace DesertPaintLab
             result &= (papyErrorCount < (swatchWidth / 20)); // allow up to 5% error rate checking for papy texture, because this seems to be inconsistent
             if (!result && ((i > (swatchWidth*0.8)) || (papyErrorCount >= (swatchWidth/20))))
             {
-                WriteLog("Found a potential swatch candidate of width {0} at {1},{2} that had {3} failures matching papyrus texture", i, x, y, papyErrorCount);
+                if (!borderError && (papyErrorCount < swatchWidth))
+                {
+                    WriteLog("Found a potential swatch candidate of width {0} at {1},{2} that had {3} failures matching papyrus texture", i, x, y, papyErrorCount);
+                }
             }
 
             return result;