libcompress-raw-bzip2-perl 2.011-2 (i386 binary) in ubuntu jaunty

 This package provides a low-level interface to bzip2 compression library for
 perl.
 .
 Usually, you don't need to use this directly; modules like
 IO::Compress::Bzip2 provide a nice, more high-level interface for your in your
 own perl programs.