Running Fences 5.53 (with Chameleon), and Start11 2.08.  For several releases (Maybe always???) I have noticed an issue.  The graphic portion of most, and sometimes all, of my icons, will disappear,  My fences are displayed, I can see the text of my icon name, but the graphic is gone.   This condition will exist until I reboot, and then everything is fine.  It will stay fine often for several days up to a week.  I can turn Chameleon OFF, and all icons are displayed properly.  I turn Chameleon back on, and my icons (but not text) are hidden.