Note that as of 13.02, we are no longer making releases for Ubuntu 12.04 LTS (Precise) nor Ubuntu 12.10 (Quantal). We recommend most users skip the 13.02 and 13.03 releases, which are higher risk as we turn on the remaining Dmedia behaviours and migrate to the V1 hashing protocol and schema.
We recommend users continue to use 13.01 for now, and then upgrade to Ubuntu Raring after its stable release comes out in April (13.04).
For details on how the V0 => V1 migration will work, please see this post:
https://plus.google.com/u/0/114471118004229223857/posts/SyZVjzqBNmA