diff --git a/admin_manual/release_notes.rst b/admin_manual/release_notes.rst
index 3fe8da5ce..b9f93fc12 100644
--- a/admin_manual/release_notes.rst
+++ b/admin_manual/release_notes.rst
@@ -26,7 +26,7 @@ Supported Platforms
   only), Linux (CentOS 6.5, 7, Ubuntu 12.04 LTS, 14.04 LTS, 14.10, Fedora 20, 
   21, openSUSE 12.3, 13)
 * Mobile apps: iOS 7+, Android 4+
-* Web browser: IE8+, Firefox 14+, Chrome 18+, Safari 5+
+* Web browser: IE8+ (but not compatibility mode), Firefox 14+, Chrome 18+, Safari 5+
 
 Older Desktop Clients Not Allowed to Connect and Sync
 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^