I want to add that I found a workaround.
If I uncheck the "always on top" and then check it again the icons are visible again.

Hi, I'm running Dexpot 1.5.13.1721 on Windows 7 Professional SP1, 32bits version. I usually use a virtual desktop to run a fullscreen terminal service with my father pc. The thing is that sometimes the desktop manager icons hide behind the terminal service, even when I always have "always on to...