Public bug reported:

Binary package hint: libjpeg8

[Maverick]
AC had previously been omitted because it was covered by patents, which have 
subsequently expired. It has been enabled in the latest Fedora version (using 
libjpeg-turbo).
At the least, read support for arithmetic-coded JPEGs should be enabled.

Example:
$ wget http://upload.wikimedia.org/wikipedia/commons/3/3b/Rabbit_in_montana.jpg
[blah blah]
$ jpegtran -optimize -arithmetic ./Rabbit_in_montana.jpg > out.jpg
Requested feature was omitted at compile time

** Affects: libjpeg8 (Ubuntu)
     Importance: Undecided
         Status: New

** Description changed:

  Binary package hint: libjpeg8
  
  [Maverick]
  AC had previously been omitted because it was covered by patents, which have 
subsequently expired. It has been enabled in the latest Fedora version (using 
libjpeg-turbo).
+ At the least, read support for arithmetic-coded JPEGs should be enabled.
  
  Example:
  $ wget 
http://upload.wikimedia.org/wikipedia/commons/3/3b/Rabbit_in_montana.jpg
  [blah blah]
  $ jpegtran -optimize -arithmetic ./Rabbit_in_montana.jpg > out.jpg
  Requested feature was omitted at compile time

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https://bugs.launchpad.net/bugs/733092

Title:
  libjpeg compiled without arithmetic coding support

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