1. The article [Q307077] explains that if icons are used on the Quick Launch bar to gain access to shared application data on a network drive, icons may disappear and occurs if the connection to the shared directory is lost.
2. The article [Q321213] states that when using the Windows Classic theme in Windows XP, icons in the notification area on the right side of the taskbar may disappear when selecting a High Contrast scheme in the Color Schemes box on the Appearance tab. The suggested work around is to right-click a blank area of the taskbar, and then click Lock the Taskbar. Or, change the size of the taskbar, and then restore it.
3. The article [Q324250] states that after restoring the default setting of the window from the High Contrast appearance scheme of the Accessibility Options, the icons on the tool bar may disappear. The suggested work around for this problem is to minimize the window, and then press F5 to refresh the screen.
Pardon ma ACKsent, ah'm frum Austin, Tex_As, USA
....its been my policy to view the Internet not as an 'information highway,' but as an electronic asylum filled with babbling loonies.