This is with version 2.75 running under Firefox 1.0 and
Fedora Core 3
The plugin starts OK, but stops at buffering 0%
Looking at the strace output seems to indicate it
downloads the .asx file fine, but the it neither
actually downloads any of the content referenced
therein nor starts mplayer.
Downloading the .asx manually and feeding it into
mplayer -playlist works fine.