too mach distortion on color gradient

Hallo all,
i ready send one emeil with screenshots but it seems to take some time
till it will be accepted, so i send one more time with links.

> Hallo all,
> there is sintel online premiere up today http://www.sintel.org/ . But
> oggtheora video is every thing but not gut. I downloaded 720p version
> but IMHO some times it looks  for me like scaled 480p. In my
> experience theora can do better, or em i wrong?
> 
> strings Sintel.2010.720p.Theora-VODO give me fallowing:
> ENCODER=ffmpeg2theora-0.24
> Xiph.Org libtheora 1.1 20090822 (Thusnelda)
> 
> http://shareimage.org/images/yicir19o4035voren5u.png
> http://shareimage.org/images/00v5d065wxwpobfwu3d.png
> http://shareimage.org/images/vd12gz2612ba2w1ji5r.png
> http://shareimage.org/images/srrubfvkflcj8ncd8hx.png
> 
> PS: May be it will be good idea to make ffmpeg2theora write to ENCODER
> section encoder parameters too?