diff --git a/skins/default/mail.css b/skins/default/mail.css
index 5bf05cb99..61e46d0cc 100644
--- a/skins/default/mail.css
+++ b/skins/default/mail.css
@@ -144,7 +144,9 @@
 /*\*/
 html>body*#messagecontframe
 {
+  [height: 40%;
   height: 40%;
+  ]height: 100%;
 }
 /**/