diff --git a/common/gtk-3.0/3.14/gtk-dark.css b/common/gtk-3.0/3.14/gtk-dark.css
index 729f91e..c62a38f 100644
--- a/common/gtk-3.0/3.14/gtk-dark.css
+++ b/common/gtk-3.0/3.14/gtk-dark.css
@@ -3254,6 +3254,7 @@ UnityDecoration {
       border-bottom-width: 0;
       color: rgba(207, 218, 231, 0.5); }
   UnityDecoration.left, UnityDecoration.right, UnityDecoration.bottom, UnityDecoration.left:backdrop, UnityDecoration.right:backdrop, UnityDecoration.bottom:backdrop {
+    background-color: transparent;
     background-image: linear-gradient(to bottom, rgba(32, 35, 43, 0.97)); }
 
 UnityPanelWidget,
diff --git a/common/gtk-3.0/3.14/gtk-darker.css b/common/gtk-3.0/3.14/gtk-darker.css
index 761b85d..e7633fc 100644
--- a/common/gtk-3.0/3.14/gtk-darker.css
+++ b/common/gtk-3.0/3.14/gtk-darker.css
@@ -3257,6 +3257,7 @@ UnityDecoration {
       border-bottom-width: 0;
       color: rgba(207, 218, 231, 0.5); }
   UnityDecoration.left, UnityDecoration.right, UnityDecoration.bottom, UnityDecoration.left:backdrop, UnityDecoration.right:backdrop, UnityDecoration.bottom:backdrop {
+    background-color: transparent;
     background-image: linear-gradient(to bottom, rgba(32, 35, 43, 0.97)); }
 
 UnityPanelWidget,
diff --git a/common/gtk-3.0/3.14/gtk-solid-dark.css b/common/gtk-3.0/3.14/gtk-solid-dark.css
index 090e694..4c7651e 100644
--- a/common/gtk-3.0/3.14/gtk-solid-dark.css
+++ b/common/gtk-3.0/3.14/gtk-solid-dark.css
@@ -3254,6 +3254,7 @@ UnityDecoration {
       border-bottom-width: 0;
       color: rgba(207, 218, 231, 0.5); }
   UnityDecoration.left, UnityDecoration.right, UnityDecoration.bottom, UnityDecoration.left:backdrop, UnityDecoration.right:backdrop, UnityDecoration.bottom:backdrop {
+    background-color: transparent;
     background-image: linear-gradient(to bottom, #20232b); }
 
 UnityPanelWidget,
diff --git a/common/gtk-3.0/3.14/gtk-solid-darker.css b/common/gtk-3.0/3.14/gtk-solid-darker.css
index c322fc4..1495cc5 100644
--- a/common/gtk-3.0/3.14/gtk-solid-darker.css
+++ b/common/gtk-3.0/3.14/gtk-solid-darker.css
@@ -3257,6 +3257,7 @@ UnityDecoration {
       border-bottom-width: 0;
       color: rgba(207, 218, 231, 0.5); }
   UnityDecoration.left, UnityDecoration.right, UnityDecoration.bottom, UnityDecoration.left:backdrop, UnityDecoration.right:backdrop, UnityDecoration.bottom:backdrop {
+    background-color: transparent;
     background-image: linear-gradient(to bottom, #20232b); }
 
 UnityPanelWidget,
diff --git a/common/gtk-3.0/3.14/gtk-solid.css b/common/gtk-3.0/3.14/gtk-solid.css
index f467693..a47ffa6 100644
--- a/common/gtk-3.0/3.14/gtk-solid.css
+++ b/common/gtk-3.0/3.14/gtk-solid.css
@@ -3257,6 +3257,7 @@ UnityDecoration {
       border-bottom-width: 0;
       color: rgba(82, 93, 118, 0.5); }
   UnityDecoration.left, UnityDecoration.right, UnityDecoration.bottom, UnityDecoration.left:backdrop, UnityDecoration.right:backdrop, UnityDecoration.bottom:backdrop {
+    background-color: transparent;
     background-image: linear-gradient(to bottom, rgba(0, 0, 0, 0.1)); }
 
 UnityPanelWidget,
diff --git a/common/gtk-3.0/3.14/gtk.css b/common/gtk-3.0/3.14/gtk.css
index 04e5f99..f2be733 100644
--- a/common/gtk-3.0/3.14/gtk.css
+++ b/common/gtk-3.0/3.14/gtk.css
@@ -3257,6 +3257,7 @@ UnityDecoration {
       border-bottom-width: 0;
       color: rgba(82, 93, 118, 0.5); }
   UnityDecoration.left, UnityDecoration.right, UnityDecoration.bottom, UnityDecoration.left:backdrop, UnityDecoration.right:backdrop, UnityDecoration.bottom:backdrop {
+    background-color: transparent;
     background-image: linear-gradient(to bottom, rgba(0, 0, 0, 0.1)); }
 
 UnityPanelWidget,
diff --git a/common/gtk-3.0/3.14/sass/_unity.scss b/common/gtk-3.0/3.14/sass/_unity.scss
index aaedf92..2441035 100644
--- a/common/gtk-3.0/3.14/sass/_unity.scss
+++ b/common/gtk-3.0/3.14/sass/_unity.scss
@@ -36,6 +36,7 @@ UnityDecoration {
   }
   &.left, &.right, &.bottom,
   &.left:backdrop, &.right:backdrop, &.bottom:backdrop {
+    background-color: transparent;
     background-image: linear-gradient(to bottom, if($darker=='true' or $variant == 'dark', darken($header_bg, 7%), transparentize(black, 0.9)));
   }
 }
diff --git a/common/gtk-3.0/3.16/gtk-dark.css b/common/gtk-3.0/3.16/gtk-dark.css
index 3ee17e4..1f5cbed 100644
--- a/common/gtk-3.0/3.16/gtk-dark.css
+++ b/common/gtk-3.0/3.16/gtk-dark.css
@@ -3131,6 +3131,7 @@ UnityDecoration {
       border-bottom-width: 0;
       color: rgba(207, 218, 231, 0.5); }
   UnityDecoration.left, UnityDecoration.right, UnityDecoration.bottom, UnityDecoration.left:backdrop, UnityDecoration.right:backdrop, UnityDecoration.bottom:backdrop {
+    background-color: transparent;
     background-image: linear-gradient(to bottom, rgba(32, 35, 43, 0.97)); }
 
 UnityPanelWidget,
diff --git a/common/gtk-3.0/3.16/gtk-darker.css b/common/gtk-3.0/3.16/gtk-darker.css
index 9c7548e..a94ef55 100644
--- a/common/gtk-3.0/3.16/gtk-darker.css
+++ b/common/gtk-3.0/3.16/gtk-darker.css
@@ -3134,6 +3134,7 @@ UnityDecoration {
       border-bottom-width: 0;
       color: rgba(207, 218, 231, 0.5); }
   UnityDecoration.left, UnityDecoration.right, UnityDecoration.bottom, UnityDecoration.left:backdrop, UnityDecoration.right:backdrop, UnityDecoration.bottom:backdrop {
+    background-color: transparent;
     background-image: linear-gradient(to bottom, rgba(32, 35, 43, 0.97)); }
 
 UnityPanelWidget,
diff --git a/common/gtk-3.0/3.16/gtk-solid-dark.css b/common/gtk-3.0/3.16/gtk-solid-dark.css
index 1038d04..bb3978a 100644
--- a/common/gtk-3.0/3.16/gtk-solid-dark.css
+++ b/common/gtk-3.0/3.16/gtk-solid-dark.css
@@ -3131,6 +3131,7 @@ UnityDecoration {
       border-bottom-width: 0;
       color: rgba(207, 218, 231, 0.5); }
   UnityDecoration.left, UnityDecoration.right, UnityDecoration.bottom, UnityDecoration.left:backdrop, UnityDecoration.right:backdrop, UnityDecoration.bottom:backdrop {
+    background-color: transparent;
     background-image: linear-gradient(to bottom, #20232b); }
 
 UnityPanelWidget,
diff --git a/common/gtk-3.0/3.16/gtk-solid-darker.css b/common/gtk-3.0/3.16/gtk-solid-darker.css
index fe6c2f0..f342c13 100644
--- a/common/gtk-3.0/3.16/gtk-solid-darker.css
+++ b/common/gtk-3.0/3.16/gtk-solid-darker.css
@@ -3134,6 +3134,7 @@ UnityDecoration {
       border-bottom-width: 0;
       color: rgba(207, 218, 231, 0.5); }
   UnityDecoration.left, UnityDecoration.right, UnityDecoration.bottom, UnityDecoration.left:backdrop, UnityDecoration.right:backdrop, UnityDecoration.bottom:backdrop {
+    background-color: transparent;
     background-image: linear-gradient(to bottom, #20232b); }
 
 UnityPanelWidget,
diff --git a/common/gtk-3.0/3.16/gtk-solid.css b/common/gtk-3.0/3.16/gtk-solid.css
index b62fdf9..9826ddc 100644
--- a/common/gtk-3.0/3.16/gtk-solid.css
+++ b/common/gtk-3.0/3.16/gtk-solid.css
@@ -3134,6 +3134,7 @@ UnityDecoration {
       border-bottom-width: 0;
       color: rgba(82, 93, 118, 0.5); }
   UnityDecoration.left, UnityDecoration.right, UnityDecoration.bottom, UnityDecoration.left:backdrop, UnityDecoration.right:backdrop, UnityDecoration.bottom:backdrop {
+    background-color: transparent;
     background-image: linear-gradient(to bottom, rgba(0, 0, 0, 0.1)); }
 
 UnityPanelWidget,
diff --git a/common/gtk-3.0/3.16/gtk.css b/common/gtk-3.0/3.16/gtk.css
index ca6624b..9a51506 100644
--- a/common/gtk-3.0/3.16/gtk.css
+++ b/common/gtk-3.0/3.16/gtk.css
@@ -3134,6 +3134,7 @@ UnityDecoration {
       border-bottom-width: 0;
       color: rgba(82, 93, 118, 0.5); }
   UnityDecoration.left, UnityDecoration.right, UnityDecoration.bottom, UnityDecoration.left:backdrop, UnityDecoration.right:backdrop, UnityDecoration.bottom:backdrop {
+    background-color: transparent;
     background-image: linear-gradient(to bottom, rgba(0, 0, 0, 0.1)); }
 
 UnityPanelWidget,
diff --git a/common/gtk-3.0/3.16/sass/_unity.scss b/common/gtk-3.0/3.16/sass/_unity.scss
index aaedf92..2441035 100644
--- a/common/gtk-3.0/3.16/sass/_unity.scss
+++ b/common/gtk-3.0/3.16/sass/_unity.scss
@@ -36,6 +36,7 @@ UnityDecoration {
   }
   &.left, &.right, &.bottom,
   &.left:backdrop, &.right:backdrop, &.bottom:backdrop {
+    background-color: transparent;
     background-image: linear-gradient(to bottom, if($darker=='true' or $variant == 'dark', darken($header_bg, 7%), transparentize(black, 0.9)));
   }
 }
diff --git a/common/gtk-3.0/3.18/gtk-dark.css b/common/gtk-3.0/3.18/gtk-dark.css
index 4f073b4..a6d91ac 100644
--- a/common/gtk-3.0/3.18/gtk-dark.css
+++ b/common/gtk-3.0/3.18/gtk-dark.css
@@ -3283,6 +3283,7 @@ UnityDecoration {
       border-bottom-width: 0;
       color: rgba(207, 218, 231, 0.5); }
   UnityDecoration.left, UnityDecoration.right, UnityDecoration.bottom, UnityDecoration.left:backdrop, UnityDecoration.right:backdrop, UnityDecoration.bottom:backdrop {
+    background-color: transparent;
     background-image: linear-gradient(to bottom, rgba(32, 35, 43, 0.97)); }
 
 UnityPanelWidget,
diff --git a/common/gtk-3.0/3.18/gtk-darker.css b/common/gtk-3.0/3.18/gtk-darker.css
index fd811f1..aeba0b1 100644
--- a/common/gtk-3.0/3.18/gtk-darker.css
+++ b/common/gtk-3.0/3.18/gtk-darker.css
@@ -3286,6 +3286,7 @@ UnityDecoration {
       border-bottom-width: 0;
       color: rgba(207, 218, 231, 0.5); }
   UnityDecoration.left, UnityDecoration.right, UnityDecoration.bottom, UnityDecoration.left:backdrop, UnityDecoration.right:backdrop, UnityDecoration.bottom:backdrop {
+    background-color: transparent;
     background-image: linear-gradient(to bottom, rgba(32, 35, 43, 0.97)); }
 
 UnityPanelWidget,
diff --git a/common/gtk-3.0/3.18/gtk-solid-dark.css b/common/gtk-3.0/3.18/gtk-solid-dark.css
index f3415c5..b9f9f39 100644
--- a/common/gtk-3.0/3.18/gtk-solid-dark.css
+++ b/common/gtk-3.0/3.18/gtk-solid-dark.css
@@ -3283,6 +3283,7 @@ UnityDecoration {
       border-bottom-width: 0;
       color: rgba(207, 218, 231, 0.5); }
   UnityDecoration.left, UnityDecoration.right, UnityDecoration.bottom, UnityDecoration.left:backdrop, UnityDecoration.right:backdrop, UnityDecoration.bottom:backdrop {
+    background-color: transparent;
     background-image: linear-gradient(to bottom, #20232b); }
 
 UnityPanelWidget,
diff --git a/common/gtk-3.0/3.18/gtk-solid-darker.css b/common/gtk-3.0/3.18/gtk-solid-darker.css
index 8874150..99f247a 100644
--- a/common/gtk-3.0/3.18/gtk-solid-darker.css
+++ b/common/gtk-3.0/3.18/gtk-solid-darker.css
@@ -3286,6 +3286,7 @@ UnityDecoration {
       border-bottom-width: 0;
       color: rgba(207, 218, 231, 0.5); }
   UnityDecoration.left, UnityDecoration.right, UnityDecoration.bottom, UnityDecoration.left:backdrop, UnityDecoration.right:backdrop, UnityDecoration.bottom:backdrop {
+    background-color: transparent;
     background-image: linear-gradient(to bottom, #20232b); }
 
 UnityPanelWidget,
diff --git a/common/gtk-3.0/3.18/gtk-solid.css b/common/gtk-3.0/3.18/gtk-solid.css
index 6b619be..1eacc5f 100644
--- a/common/gtk-3.0/3.18/gtk-solid.css
+++ b/common/gtk-3.0/3.18/gtk-solid.css
@@ -3290,6 +3290,7 @@ UnityDecoration {
       border-bottom-width: 0;
       color: rgba(82, 93, 118, 0.5); }
   UnityDecoration.left, UnityDecoration.right, UnityDecoration.bottom, UnityDecoration.left:backdrop, UnityDecoration.right:backdrop, UnityDecoration.bottom:backdrop {
+    background-color: transparent;
     background-image: linear-gradient(to bottom, rgba(0, 0, 0, 0.1)); }
 
 UnityPanelWidget,
diff --git a/common/gtk-3.0/3.18/gtk.css b/common/gtk-3.0/3.18/gtk.css
index ad8f3e8..5aff150 100644
--- a/common/gtk-3.0/3.18/gtk.css
+++ b/common/gtk-3.0/3.18/gtk.css
@@ -3290,6 +3290,7 @@ UnityDecoration {
       border-bottom-width: 0;
       color: rgba(82, 93, 118, 0.5); }
   UnityDecoration.left, UnityDecoration.right, UnityDecoration.bottom, UnityDecoration.left:backdrop, UnityDecoration.right:backdrop, UnityDecoration.bottom:backdrop {
+    background-color: transparent;
     background-image: linear-gradient(to bottom, rgba(0, 0, 0, 0.1)); }
 
 UnityPanelWidget,
diff --git a/common/gtk-3.0/3.18/sass/_unity.scss b/common/gtk-3.0/3.18/sass/_unity.scss
index aaedf92..2441035 100644
--- a/common/gtk-3.0/3.18/sass/_unity.scss
+++ b/common/gtk-3.0/3.18/sass/_unity.scss
@@ -36,6 +36,7 @@ UnityDecoration {
   }
   &.left, &.right, &.bottom,
   &.left:backdrop, &.right:backdrop, &.bottom:backdrop {
+    background-color: transparent;
     background-image: linear-gradient(to bottom, if($darker=='true' or $variant == 'dark', darken($header_bg, 7%), transparentize(black, 0.9)));
   }
 }
diff --git a/common/gtk-3.0/3.20/gtk-dark.css b/common/gtk-3.0/3.20/gtk-dark.css
index 98ea97e..1f0e767 100644
--- a/common/gtk-3.0/3.20/gtk-dark.css
+++ b/common/gtk-3.0/3.20/gtk-dark.css
@@ -3593,6 +3593,7 @@ UnityDecoration {
       border-bottom-width: 0;
       color: rgba(207, 218, 231, 0.5); }
   UnityDecoration.left, UnityDecoration.right, UnityDecoration.bottom, UnityDecoration.left:backdrop, UnityDecoration.right:backdrop, UnityDecoration.bottom:backdrop {
+    background-color: transparent;
     background-image: linear-gradient(to bottom, rgba(32, 35, 43, 0.97)); }
 
 UnityPanelWidget,
diff --git a/common/gtk-3.0/3.20/gtk-darker.css b/common/gtk-3.0/3.20/gtk-darker.css
index f735403..aeb90a7 100644
--- a/common/gtk-3.0/3.20/gtk-darker.css
+++ b/common/gtk-3.0/3.20/gtk-darker.css
@@ -3591,6 +3591,7 @@ UnityDecoration {
       border-bottom-width: 0;
       color: rgba(207, 218, 231, 0.5); }
   UnityDecoration.left, UnityDecoration.right, UnityDecoration.bottom, UnityDecoration.left:backdrop, UnityDecoration.right:backdrop, UnityDecoration.bottom:backdrop {
+    background-color: transparent;
     background-image: linear-gradient(to bottom, rgba(32, 35, 43, 0.97)); }
 
 UnityPanelWidget,
diff --git a/common/gtk-3.0/3.20/gtk-solid-dark.css b/common/gtk-3.0/3.20/gtk-solid-dark.css
index 4165e5b..c81bf0a 100644
--- a/common/gtk-3.0/3.20/gtk-solid-dark.css
+++ b/common/gtk-3.0/3.20/gtk-solid-dark.css
@@ -3593,6 +3593,7 @@ UnityDecoration {
       border-bottom-width: 0;
       color: rgba(207, 218, 231, 0.5); }
   UnityDecoration.left, UnityDecoration.right, UnityDecoration.bottom, UnityDecoration.left:backdrop, UnityDecoration.right:backdrop, UnityDecoration.bottom:backdrop {
+    background-color: transparent;
     background-image: linear-gradient(to bottom, #20232b); }
 
 UnityPanelWidget,
diff --git a/common/gtk-3.0/3.20/gtk-solid-darker.css b/common/gtk-3.0/3.20/gtk-solid-darker.css
index dac6610..c935724 100644
--- a/common/gtk-3.0/3.20/gtk-solid-darker.css
+++ b/common/gtk-3.0/3.20/gtk-solid-darker.css
@@ -3591,6 +3591,7 @@ UnityDecoration {
       border-bottom-width: 0;
       color: rgba(207, 218, 231, 0.5); }
   UnityDecoration.left, UnityDecoration.right, UnityDecoration.bottom, UnityDecoration.left:backdrop, UnityDecoration.right:backdrop, UnityDecoration.bottom:backdrop {
+    background-color: transparent;
     background-image: linear-gradient(to bottom, #20232b); }
 
 UnityPanelWidget,
diff --git a/common/gtk-3.0/3.20/gtk-solid.css b/common/gtk-3.0/3.20/gtk-solid.css
index 20305dc..e82e4bc 100644
--- a/common/gtk-3.0/3.20/gtk-solid.css
+++ b/common/gtk-3.0/3.20/gtk-solid.css
@@ -3595,6 +3595,7 @@ UnityDecoration {
       border-bottom-width: 0;
       color: rgba(82, 93, 118, 0.5); }
   UnityDecoration.left, UnityDecoration.right, UnityDecoration.bottom, UnityDecoration.left:backdrop, UnityDecoration.right:backdrop, UnityDecoration.bottom:backdrop {
+    background-color: transparent;
     background-image: linear-gradient(to bottom, rgba(0, 0, 0, 0.1)); }
 
 UnityPanelWidget,
diff --git a/common/gtk-3.0/3.20/gtk.css b/common/gtk-3.0/3.20/gtk.css
index bc24bb5..ef72998 100644
--- a/common/gtk-3.0/3.20/gtk.css
+++ b/common/gtk-3.0/3.20/gtk.css
@@ -3595,6 +3595,7 @@ UnityDecoration {
       border-bottom-width: 0;
       color: rgba(82, 93, 118, 0.5); }
   UnityDecoration.left, UnityDecoration.right, UnityDecoration.bottom, UnityDecoration.left:backdrop, UnityDecoration.right:backdrop, UnityDecoration.bottom:backdrop {
+    background-color: transparent;
     background-image: linear-gradient(to bottom, rgba(0, 0, 0, 0.1)); }
 
 UnityPanelWidget,
diff --git a/common/gtk-3.0/3.20/sass/_unity.scss b/common/gtk-3.0/3.20/sass/_unity.scss
index 87866fc..f83e73c 100644
--- a/common/gtk-3.0/3.20/sass/_unity.scss
+++ b/common/gtk-3.0/3.20/sass/_unity.scss
@@ -36,6 +36,7 @@ UnityDecoration {
   }
   &.left, &.right, &.bottom,
   &.left:backdrop, &.right:backdrop, &.bottom:backdrop {
+    background-color: transparent;
     background-image: linear-gradient(to bottom, if($darker=='true' or $variant == 'dark', darken($header_bg, 7%), transparentize(black, 0.9)));
   }
 }