bwa (0.6.0-1) unstable; urgency=low

    Branch 0.6.x index data structure changed and is incompatible with index
    data structure previously used by branch 0.5.x. You will need to rebuild
    all your indexes.

 -- Carlos Borroto <carlos.borroto@gmail.com>  Thu, 22 Jun 2012 15:53:58 -0400