Icon for the program is not visible in X11 environment due to wrong path. File /usr/share/applications/linsmith.desktop contains: Icon=/usr/share/pixmaps/linsmith/linsmith_icon.xpm while, according to installation path, it should be: Icon=/usr/share/pixmaps/linsmith_icon.xpm
Fixed in -r1 version. Thansk for reporting. >sci-electronics/linsmith: fix icon path (bug #604314). Thks A. Truccone