Just noticed the same thing on my machine. This is a T61, with NVS 140m graphics card. I downgraded from 185.19 to 180.44.
I tried x11, gl and xv. x11 and gl (as well as gl2) work properly. xv doesn't work,- I get a black video window.
The mplayer logs are produced by:
mplayer -msglevel all=9 -vo <xv|x11|gl>
Also my ~/.mplayer/config:
ao = alsa,oss
vo = xv
softvol = "yes"
font = "DejaVu Sans Mono"
hue = 0