need help debugging highlighting on hardware players

I'm completely new to dvd authoring and using dvdauthor tools.  I have
two standalone dvd players for testing, a Pioneer DV-333 and a Toshiba
SD-3950, and am having difficulty generating a menu with my preferred
dvdauthor frontend where the highlighting action works properly on both
players.  At this point I don't know if this is a problem with dvdauthor
or with the frontend app generating less than optimal script and am
hoping someone can offer advice.

Here is an example of a simple one page menu with two buttons with
highlighting action that DOES work properly on both players. When I
press an arrow key I see the highlighting change from one button to the
next. This was generated by Bombono 1.2.0 on Ubuntu 10.04 which uses
dvdauthor 0.6.14:

dvdauthor.xml: http://pastebin.com/fH59K40A
menu.xml: http://pastebin.com/9A8zbaaT

Here is a second example where the highlighting works properly on the
Pioneer DV-333 but does NOT work properly on the Toshiba SD-3950.  This
is a different menu but is still a simple single page with two buttons.
  This was generated by DVDStyler 2.1b2 on WinXP Pro SP3 which uses
dvdauthor 0.7.0 but identical broken highlighting behavior is observed
with DVDStyler 1.8.0 which uses dvdauthor 0.6.14:

dvdauthor.xml: http://pastebin.com/uribUNC5
menu.xml: http://pastebin.com/Xbrge3PA

While functioning fine on the Pioneer the behavior on the Toshiba is
that when an arrow key is pressed the button is invisibly selected but
there is no visible change in the highlighting action.  If button 1 is
the default initial selection it will be highlighted but pressing any
arrow key any number of times will never move the highlighting to button
2 on the Toshiba.

Can anyone look at these scripts and tell me if there is something
obvious going on that might cause highlighting to work on one player but
not the other?

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