diff --git a/plugins/c9.ide.layout.classic/themes/flat-light.less b/plugins/c9.ide.layout.classic/themes/flat-light.less
index a7fae696..81b10dda 100644
--- a/plugins/c9.ide.layout.classic/themes/flat-light.less
+++ b/plugins/c9.ide.layout.classic/themes/flat-light.less
@@ -401,15 +401,14 @@
     pointer-events: auto;
 }
 .ace_tree .tree-row .checkbox.checked{
-    background: white url("@{image-path}/@{menu-check}");
     background-position: -2px -2px;
 }
 .ace_tree .tree-row .checkbox.half-checked{
-    background: #DDDDDD url("@{image-path}/@{menu-check}");
+    background-color: #DDDDDD;
     background-position: -2px -2px;
 }
 .installer .execute .progress{
-    bottom: -50px;
+    bottom: -44px;
 }
 
 @media print, (-o-min-device-pixel-ratio: 5/4), (-webkit-min-device-pixel-ratio: 1.25), (min-resolution: 1.25dppx) {
diff --git a/plugins/c9.ide.ui/widgets.less b/plugins/c9.ide.ui/widgets.less
index 2f8fe022..8fcfbef4 100644
--- a/plugins/c9.ide.ui/widgets.less
+++ b/plugins/c9.ide.ui/widgets.less
@@ -54,11 +54,11 @@
     pointer-events: auto;
 }
 .ace_tree .tree-row .checkbox.checked{
-    background: #2D2D2D url("@{image-path}/@{menu-check}");
+    background-image: url("@{image-path}/@{menu-check}");
     background-position: -2px -18px;
 }
 .ace_tree .tree-row .checkbox.half-checked{
-    background: #565656 url("@{image-path}/@{menu-check}");
+    background-color: #565656;
     background-position: -2px -18px;
 }