The CMS open data VM images have been updated, and the VM records on the portal are being updated correspondingly.
Meanwhile, you can find the images to be used in
- https://cernvm.cern.ch/releases/CMS-OpenData-1.1.4.ova with a slc5-based shell for 2010 data
- https://cernvm.cern.ch/releases/CMS-OpenData-1.5.3.ova with a slc6-based shell for 2011-2012 data
The earlier images are deprecated.
for the CMS open data team