png problem
      
        Dear all
Sorry if  I am asking on the wrong list, as this may not actually be a 
GIMP problem.
  I am trying to make a menu for a DVD, and following instructions at
http://mightylegends.zapto.org/dvd/dvdauthor_howto.php
I made a background as .jpg, and two buttons as .png files - to show 
"highlighted" and "selected". No problems, and quite fun. Actually 
learnt something of Gimp layers, which I had been intending to do for 
months.
jpg is OK, but png's fail to load when  I try to use spumux to multiplex 
the button .pngs with the background.
I tried to open the .pngs with kiconedit, and in konqueror, but no joy. 
They display fine with Mozilla.
System Mandrake 10.  I have tried saving from both Gimp 1.2 and 1.3
I can easily post the files if there is any need - nothing confidential 
in a couple of coloured rectangles.
Thanks for any help
Russell