http://bugs.winehq.org/show_bug.cgi?id=10476
--- Comment #4 from Bamm Gabriana bammzilla@gabriana.com 2007-11-17 06:57:04 --- Peter, from your screenshot it looks like the titlebar was filled in by Ubuntu's window manager.
Safari provides its own titlebar as can be seen in attachment 8303 to bug 9836, and can be seen in Windows XP screenshot here. Safari's titlebar is missing.