Software players behaving weird

Hi,

I am trying to create a DVD with two films on it and a very simple structure:

 * a static menu with two buttons, one for each film
 * the menu waits until a button is clicked
 * when you click on a button, the corresponding film is played back
 * after the film has finished, the DVD jumps back to the menu

This should be among the easiest things doable with dvdauthor. I tried the 
following XML file:

<dvdauthor dest="DVD">
  <vmgm />
  <titleset>
    <menus lang="en">
      <pgc entry="root">
        <vob file="TOC_final.mpg" pause="inf" />
        <button> jump title 1; </button>
        <button> jump title 2; </button>
      </pgc>
    </menus>
    <titles>
      <pgc>
        <vob file="FirstFilm.mpg" />
        <post> call menu; </post>
      </pgc>
      <pgc>
        <vob file="SecondFilm.mpg" />
        <post> call menu; </post>
      </pgc>
    </titles>
  </titleset>
</dvdauthor>

TOC_final.mpg is a four-seconds video muxed in such a way as to draw a grey 
border around the button when highlighted, and a green one when selected.

Using VLC and Windows Media Player, this setup does exactly what I wanted it 
to do. However, for other software players, Strange Things (TM) happen:

 * Kaffeine seems to start the first video in the background: When I wait in 
the menu for more than four seconds (4+X) and then click on the first button, 
I'm already X seconds within the first video. (Also clicking "DVD menu" does 
nothing.)
 * Dragon Player behaves the same w.r.t. the menu/start issue. When clicking 
"DVD menu" in the middle of the film, I am back in the menu, but the 
highlight effect is broken; the grey border is split in many small pieces and 
drawn somehow *over* the button. Don't know how to describe that better.
 * "mplayer dvd://" starts right with the first video.
 * "mplayer dvdnav://" states: "No stream found to handle url dvdnav://"

I also tried to have a "jump cell 1" post-command instead of "pause='inf'" 
in the menu in order to get a loop, but at least in dragon player, this 
immediately led to the weird appearance I described.

Are these players known to be "broken" in that way? Or is there something 
wrong with my dvdauthor XML file? I think this should be the right way to go, 
shouldn't it?

Thanks for your help,
Tobias

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