Public bug reported:

Binary package hint: tar

A few days ago, gnu tar was upgraded to version 1.21. It could be great
to have it for jaunty, because it adds support for both compressing and
decompressing lzma archives.

http://www.gnu.org/software/tar/#TOCreleases

"    *  New short option -J, an alias for --lzma
    * New option --lzop
    * New option --no-auto-compress,

      Cancels the effect of previous --auto-compress (-a) option
    * New option --no-null

      Cancels the effect of previous --null option.
    * Compressed format recognition

      If tar is unable to determine archive compression format, it falls back 
to using archive suffix to determine it.
    * VCS support

      Using --exclude-vcs handles also files used internally by Bazaar, 
Mercurial and Darcs.
    * Transformation scope flags

      Name transformation expressions understand additional flags that
control type of archive members affected by them. The flags are:

      r
          Apply transformation to regular archive members.
      s
          Apply transformation to symbolic link targets.
      h
          Apply transformation to hard link targets.

      The corresponding upper-case letters negate the meaning, so that H
means do not apply transformation to hard link targets.

      The scope flags are listed in the third part of a s expression,
e.g.:

      $ tar --transform 's|^|/usr/local/|S'
                

      The default is rsh, which means that transformations are applied
to both regular archive members and to the targets of symbolic and hard
links.

      If several transform expressions are used, the default flags can
be changed using flags= statement placed before the expressions, e.g.:

      $ tar --transform 'flags=S;s|^|/usr/local/|'
                

    * Bugfixes:
         1. The --null option disabled handling of tar options in list files. 
This is fixed.
         2. Fixed record size autodetection. If detected record size differs 
from the expected value (either default, or set on the command line), tar 
prints a warning if verbosity level is set to 1 or greater, i.e. if either -t 
or -v option is given."

** Affects: tar (Ubuntu)
     Importance: Undecided
         Status: New

-- 
Please upgrade to gnu tar 1.21
https://bugs.launchpad.net/bugs/312674
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