[dwm] MPlayer fullscreen on a tiled layout

As I wrote on IRC, there is a strange behaviour about MPlayer when used
on a tiled layout in dwm.

1.
When I start it (`mplayer <filename>`, for example) it goes tiled, ok,
but if I try to fullscreen it with "f", mplayer window goes float
_under_ tiled clients. Shouldn't stay on top?

2.
`mplayer -vo x11 -nofs <file>` (no fullscreen now) keeps aspect, and
it's all good, but `mplayer -vo xv -nofs <file>` doesn't, so with these
options, mplayer video is "stretched".
Why there is a so different behaviour? A friend of mine told me this
doesn't happen (proportions are preseved using xv video output) on ion,
but I don't use it so I can't confirm.

Thanks so much,

-- 
Marco Squarcina >|<  www.minimalblue.com >|< GPG key: 6E47BFC5