systray ti služi kad dobiješ e-mail ikonica se promeni.
Inače iz CHANGELOG
-a 7.5 preview 3.
New: System Tray Icon
For even better notification of new messages (and perhaps more later), Opera now has a system tray icon. When you receive new messages in the Unread view, it will change to an envelope. You can also focus or exit Opera from the icon's context menu.