diff -rup idesk-0.7.5/src/DesktopIconConfig.cpp ./idesk-0.7.5m/src/DesktopIconConfig.cpp
--- idesk-0.7.5/src/DesktopIconConfig.cpp	2005-08-27 10:58:56.000000000 +0200
+++ ./idesk-0.7.5m/src/DesktopIconConfig.cpp	2008-05-22 15:00:28.000000000 +0200
@@ -219,6 +219,8 @@ void CommonOptions::setOptions(Table t)
 
     if (table.Query("SnapShadowTrans") != "")
         snapShadowTrans = atoi(table.Query("SnapShadowTrans").c_str());
+    else
+        snapShadowTrans = 200; // defaults
 
     //captionOnHover
     if (getUpper(table.Query("CaptionOnHover")) == "TRUE")
diff -rup idesk-0.7.5/src/XImlib2Image.cpp ./idesk-0.7.5m/src/XImlib2Image.cpp
--- idesk-0.7.5/src/XImlib2Image.cpp	2005-09-11 08:17:58.000000000 +0200
+++ ./idesk-0.7.5m/src/XImlib2Image.cpp	2008-05-22 15:11:27.000000000 +0200
@@ -50,12 +50,19 @@ void XImlib2Image::configure()
 		    dynamic_cast<DesktopConfig *>(config);
 
     transparency = dConfig->getTransparency();
+    
 
     width = dIconConfig->getWidth();
     height = dIconConfig->getHeight();
     
     glowing = false;
     glowChange = true;
+    if ( transparency >= 0 ) {
+        glowInvert = false; 
+    } else {
+        glowInvert = true;
+        transparency = - transparency ;
+    }
 
     colorMod = imlib_create_color_modifier();
     
@@ -324,7 +331,7 @@ void XImlib2Image::applyMouseOverEffects
 		imlib_get_color_modifier_tables(mapNone, mapNone, mapNone, NULL);
 		imlib_reset_color_modifier();
 
-	if (glowing == true)  // reset to standard alpha mapping
+	if ((glowing ^ glowInvert) == true)  // reset to standard alpha mapping
            imlib_set_color_modifier_tables(mapNone, mapNone, mapNone, mapNone);
 	else  // remap alpha values lower to increase transparency
 	       imlib_set_color_modifier_tables(mapNone, mapNone, mapNone, defaultTransTable);
diff -rup idesk-0.7.5/src/XImlib2Image.h ./idesk-0.7.5m/src/XImlib2Image.h
--- idesk-0.7.5/src/XImlib2Image.h	2005-09-11 08:02:39.000000000 +0200
+++ ./idesk-0.7.5m/src/XImlib2Image.h	2008-05-22 14:54:35.000000000 +0200
@@ -55,7 +55,7 @@ class XImlib2Image : public AbstractImag
 	/* Test para SVG*/
     unsigned char *rgb, *alpha, *alpha2;
 	
-    bool glowing, glowChange;
+    bool glowing, glowChange, glowInvert;
 
     int transparency;
     Imlib_Color_Modifier colorMod;
diff -rup idesk-0.7.5/src/XImlib2Shadow.cpp ./idesk-0.7.5m/src/XImlib2Shadow.cpp
--- idesk-0.7.5/src/XImlib2Shadow.cpp	2005-08-27 07:40:15.000000000 +0200
+++ ./idesk-0.7.5m/src/XImlib2Shadow.cpp	2008-05-22 15:04:26.000000000 +0200
@@ -53,8 +53,8 @@ void XImlib2Shadow::configure()
     
     transparency = dIconConfig->getSnapShadowTrans();
 
-    if (transparency == -1 )
-        transparency = 200; //default value
+    // if (transparency == -1 )
+    //    transparency = 200; //default value
 
     imlib_context_set_image(image);
     imlib_context_set_color_modifier(colorMod);