Login items disappearing, or not staying away after removal
Apple's login items are exceptionally useful for launching programs, running scripts, and opening documents, folders, or other resources that are regularly accessed upon logging in. For instance, a common program to run as a login item is an email client such as Mail. Adding an application to the login items is as easy as right-clicking it in the Dock and choosing "Open at Login" from the contextual menu (in the "Options" submenu in Snow Leopard), but to add other items you must use the Accounts system preferences.… Read more