Not a false alarm.
hxxp://planeur.phpnet.org/openads/www/delivery/ajs.php?zoneid=7&target=_blank&block=1&cb=11813726291&loc=http%3A//www.volavoile.net/menu_top/menu_top_volavoile.net.htm&referer=http%3A//www.volavoile.net/planeur.phpnet.org/openads/www/delivery/ajs.php?zoneid=7&target=_blank&block=1&cb=11813726291&loc=http%3A//www.volavoile.net/menu_top/menu_top_volavoile.net.htm&referer=http%3A//www.volavoile.net/
returns
var OX_c1f304f7 = '';
OX_c1f304f7 += "<"+"script>try{$a=~[];$a={___:++$a,$$$$:....
which is malicious script, injected in your vulnerable OpenX install.
(qui est un script malveillant injecté dans votre OpenX vulnérables installer)