1
in libxosd (destroy) :
function XFreeFontSet (osd->display, osd->fontset);
with a font which do not exist segfaults.
it segfaults with all programms (I tested) which uses libxosd
I should in a first time use the method :
// * Check if we could load a font with this name
	font_name = REAL_CFG(lyricFontName);

2
some fonts don't work (in fact the majority of fonts don't work)
(it is the same thing with all programm which use libxosd)

3
sometimes, the text does not appears on all windows (for example, the
menu of kde) ; ontop is not suffisant. (it comes from libxosd because
other programms have the same comportement)

4
if shadow offset is too big, shadow is cut and  goes out of the
rectangle (lib xosd)

5
xosd plugin makes flash some video programs (in fullscreen mode for
MPlayer for example)

6
"Singit : string can't be displayed" appears when you click on 'apply'
on options in the same times the text appears : probably a problem of
mutex in xosd.c.

7
during compilation, a warning appears : it comes from the non explicit
conversion of the xosd alignement to int.