There are always people posting here having trouble with picture codecs and such.  I just want to report that I have done 2 projects with very challenging sync issues and the client uploaded the picture to Vimeo.  I dloaded the SD Mobile versions off a vimeo (which is the lowest resolution) and things worked very well in Sonar.  I still rendered audio out of Sonar and use Vegas to marry the music and send it back for approval.
 
just reporting....