With reference to: http://lists.debian.org/debian-devel/2008/08/msg00347.html mtx-changer.Adic-Scalar-24 has been fixed in the Bacula repository. Committed revision 8134.NOTE: the code wasn't part of Bacula proper. It's one of the examples we supply.
http://bacula.svn.sourceforge.net/viewvc/bacula/trunk/bacula/examples/autochangers/mtx-changer.Adic-Scalar-24?r1=2805&r2=8134