SpaceX has announced that the problem with the last launch was that the first stage regenerative engine continued burning longer than they expected. It therefore bumped into the second stage after separation. A new downward looking video that includes this action is available at:

http://mfile.akamai.com/22165/wmv/spacex.download.akamai.com/22165/F1-003.as...

73, Bruce VE9QRP