[bongo-devel] bongo does not display track lengths

[Mandar Mitra]

I'm using bongo from git (GNU Emacs 24.3.1 on Linux Mint 13 Maya).

Enabled backends: mplayer

M-x describe-variable says:

    bongo-display-track-lengths is a variable defined in `bongo.el'.
    Its value is t

    bongo-track-length-column is a variable defined in `bongo.el'.
    Its value is 60

But no track-lengths are shown. 

Would greatly appreciate pointers regarding where I should look for
a fix.

On a related note, how difficult would it be to replace the elapsed
time shown as a %-age by something of the form 
<time elapsed>/<duration>?

Thanks,
Mandar.

ps: These questions are probably more appropriate for a bongo-users
    mailing list, but I couldn't find such a list.