After upgrading to Ubuntu 15.10 Openshot шоу distorted видео when ролик in timeline

Openshot displays the видео correctly in the box when I click on the title after importing it. However, when I drag the ролик onto the timeline and start editing the image seems to go into negative/multi coloured but distorted display (there must be в ямс for the effect but sorry I do not know it!). SMplayer is displaying видео correctly so it appears to be в problem when editing видео. Идея - anyone any what's going on please?