Index: /branches/devel-threads/skins/default/mail.css
===================================================================
--- /branches/devel-threads/skins/default/mail.css	(revision 3346)
+++ /branches/devel-threads/skins/default/mail.css	(revision 3347)
@@ -173,7 +173,7 @@
   display: none;
   background-color: #fff;
+  background-color: rgba(255, 255, 255, 0.95);
   border: 1px solid #999;
   padding: 4px;
-  opacity: 0.95;
   z-index: 240;
   border-radius: 3px;