migrating Opam repo from 1.0 to 1.1

Hi Camelids, and Happy beginning of year 2014!

I've recently updated my Opam installation to the version "1.1.0".

Now when I run the command `opam list -a` after adding my
repositories, are listed only 2 packages.

opam repo remove default

REPO='https://github.com/blue-prawn/bp-opam-repo-dev.git'
opam repo add "bp-dev" $REPO

REPO='https://github.com/blue-prawn/bp-opam-repo-scm.git'
opam repo add "bp-scm" $REPO

https://github.com/blue-prawn/bp-opam-repo-dev/tree/master/packages
https://github.com/blue-prawn/bp-opam-repo-scm/tree/master/packages

I've tryed to figure out myself what could be wrong, but I found
myself unable to.
A clue or a tip would be appreciated.

-- 
Cheers,
Florent