On boot-up I am have a recurring problem. About 80% of the time I login to my account (1 user, auto logs in on startup), several menu bar icons do not load. This includes 3rd party icons and 2nd party icons (built-in). It's difficult to compare the menu bar with everything loaded properly and when some things are missing because I can't look at both at once =/ . The noticeable absences include lack of battery status icon, wifi connectivity icon, and iStat menus CPU usage. Even when I go to System Preferences to make sure that it says "Show ______ status in menu bar" is checked, and when I uncheck and recheck it, nothing happens. Oftentimes I just have to log out and log back in, however it usually doesn't work. Any ideas as to what might be causing this.