Sorry about bumping an old post but I searched for the topic of 'disappearing icons' and 'invisible icons' with zero results and was unable to find a specific solution on the internet. This link at LinuxQuestion[dot]Org was related but I don't think it applied to Bodhi.
I have an issue with icons. For what ever reason when I boot into Bodhi I find several missing icons on my IBar. The programs themselves are there just the icons are gone. My work around was to right click on the programs location on the IBar and at the top there is a icon widget from the properties I go to icon and direct it to the icons location at /usr/share/icons/gnome/ and that seems to keep them anchored. I guess this problem is trivial but it bugged me none the less.
My question is... Is it a known bug? Was there something inside normal settings to correct this?