"Stay on top" with the xv video output driver always remains disabled

Binary package hint: mplayer

General Information
===================
Description: Ubuntu 8.04.1
Release: 8.04
mplayer:
  Installed: 2:1.0~rc2-0ubuntu13

Description
===========
When a video is playing, the user can press 'T' to keep the mplayer window on top of all others. In Hardy Heron, I noticed that with the xv video output driver and with the x11 driver, that pressing 'T' does not correctly toggle that state. Instead, the message "Stay on top: disabled" appears in mplayer and no matter how many time the user presses on 'T', it'll stay disabled.

Starting mplayer with the -ontop command-line option does keep the window on top, but when the user presses 'T', it'll go to "Stay on top: disabled" and from there on, it is not possible to bring the window back on top of all the others.

The bug is present in the mplayer and mplayer-nogui packages, and other users of Hardy Heron have confirmed it.