diff --git a/htdocs/theme/common/window/alert.css b/htdocs/theme/common/window/alert.css
index 80174b74621..59bcd338d12 100644
--- a/htdocs/theme/common/window/alert.css
+++ b/htdocs/theme/common/window/alert.css
@@ -1,6 +1,6 @@
 .overlay_alert {
 	background-color: #ACBCBB;
-	filter:alpha(opacity=60);
+/*	filter:alpha(opacity=60);	*/
 	-moz-opacity: 0.6;
 	opacity: 0.6;
 }
diff --git a/htdocs/theme/common/window/alphacube.css b/htdocs/theme/common/window/alphacube.css
index 7d2790e75e1..caccabb3845 100644
--- a/htdocs/theme/common/window/alphacube.css
+++ b/htdocs/theme/common/window/alphacube.css
@@ -1,6 +1,6 @@
 .overlay_alphacube {
 	background-color: #85BBEF;
-	filter:alpha(opacity=60);
+/*	filter:alpha(opacity=60); 	*/
 	-moz-opacity: 0.6;
 	opacity: 0.6;
 }
@@ -142,7 +142,7 @@
 
 .alphacube_wired_frame {
 	background: #FFF;
-	filter:alpha(opacity=60);
+/*	filter:alpha(opacity=60);	*/
 	-moz-opacity: 0.6;
 	opacity: 0.6;	
 }
diff --git a/htdocs/theme/common/window/default.css b/htdocs/theme/common/window/default.css
index ecc89dfc879..3c4c46ae838 100644
--- a/htdocs/theme/common/window/default.css
+++ b/htdocs/theme/common/window/default.css
@@ -1,13 +1,13 @@
 .overlay_dialog {
 	background-color: #666666;
-	filter:alpha(opacity=60);
+/*	filter:alpha(opacity=60);	*/
 	-moz-opacity: 0.6;
 	opacity: 0.6;
 }
 
 .overlay___invisible__ {
   background-color: #666666;
-	filter:alpha(opacity=0);
+/*	filter:alpha(opacity=0);	*/
 	-moz-opacity: 0;
 	opacity: 0;
 }