Thanks, it works also for me with:
         , command = [
                     ...
                     Run Com "mpc" ["--format %file% | head -n 1"] "" 10,
   ...
   ]
my mistake was that i hadn't "Com" written in my Run line.

--- En date de : Sam 23.5.09, Roman Cheplyaka <roma@ro-che.info> a écrit :

Here's what I have for xmms2:

, commands = [
...
Run Com "xmms2" ["current"] "" 10,
...
]