some issues with images in pyglet
if they are too big, they seem to cause problems... maybe bigger than display?

theory supported by:
http://www.google.com/search?client=firefox-a&rls=org.mozilla%3Aen-US%3Aofficial&channel=s&hl=en&q=pyglet+images+bigger+than+window&btnG=Google+Search
pyglet images bigger than window - Google Search
http://groups.google.com/group/pyglet-users/browse_thread/thread/fca05d1f8feed7a1
direct drawing into a texture - pyglet-users | Google Groups