I've started off editing in the wrong settings (960:720 anamorphic instead of 1280:720 square pixels). I;ve created a new project with the correct settings and imported the old project into it, but the sequence I've already edited has the wrong settings and I dont appear to be able to chance the sequence settings.
Am I going to have to start again from scratch? I created new project in CS5.
Start a new sequence with the correct settings and copy / paste your clips in to it from the wrong sequence ...if you have got that far..
(and 7d footage on 3 video layers with only about 10 secs worth (out of 10 mins) of red lines as opposed to yellow - woohoo!)