thank you for your fast reply. The launchbar is included in my first posting. Look at the left three icons (firefox, thunderbird, freecommander) and the one at the right (ccleaner) - they all have this lucid "shadow" or borderline. These icons come directly from the exe-files.
The forth icon is one that I made using icoFx (.ico-file) with round and oblique outline structures - no "shadow".
And number 5 & 6 also are from the exe-files, but have only vertical and horizontal outlines - also no shadow.
It is only evident if you use dark colours or you set to "translucent", and your desktop is dark. You can a little see it with your darker skins, but mostly the skins have a colour very similar to that "shadow" - so you don´t see it at all. I guess it is a problem in "interpreting" the icon-format used in the exe-files.
Or do you mean something else?