I've taken a look at your snapshot and it indeed looks wrong. The snap_stripes.jpg loaded by my version of gnash works fine though, for both gtk and sdl, using the AGG renderer.Which renderer are you using ?
thanks for this question!now i changed the useflags to "-cairo agg" , recompiled and everything works perfect.
Thanks a lot for you help and keep up the great work! cheers Meikl