Today My machine had a niggling issue of the 'disappearance' of icons on the awn dock. The interesting thing of the issue is that the icons have just disappeared but they were functional.
In other words If I hover my mouse over the area in my desktop where my dock was previously present, it gives prop up. and if i click there those applets function without any glitch.
I thought that it could be due to graphical problems, So I changed my visual settings to NONE and lo my Dock appeared. But I was not happy with the Visual settings.
I solved it by reinstalling the AWN DOCK after removing it.