[Intel-gfx] 1080i content on 1080i shakes

[Angela]

Hello
I have the interlaced patch running (kernel 3.3, not updated since February)
and is working perfect for up to 720p TV content. However with 1080i TV
content the picture shakes almost continuously. The shaking is also viewable
when the recording is paused. Only some 1080i channels are almost OK. Others
are not viewable. 
I have updated with xorg-edgers several times for the last three months
without any improvement.

While shooting a movie (25fp) I could not capture the shaking also not when
paused. So I paused a recording and shot continuously pictures (iso1600)
showing how the picture (shirt) shakes. The pictures can be downloaded
http://www.filedropper.com/1080iplayedon1080ipaused 10MB.

I am using Sandybridge 2600K over HDMI to a 1080i television. Using mythtv
with a dedicated X Server, no Desktop, on Ubuntu 12.04 LTS.

Is this a known problem ? Any fixes ?

Thanks
Angela