The task bar on my laptop, acer aspire, runs along the bottom of the screen. Along with other icons, the icon for the pointing device, time and date are permanently shown to the left of the taskbar. Recently I have noticed that intermittently the time, date and pointing device icon with half of it coloured in blue (no blue shown on the permanent righthand side icon)also appear duplicated to the lefthand side of the taskbar. When this happens on the left side I can only describe it as ghost like icons still visible but behind the permanent icons on the left which are calculator, documents, wordpad, etc. Does anyone know what causes this? The laptop is still under warranty, having already had the motherboard and keyboard replaced after 3 months.