Python PIL : IOError: decoder jpeg not available

The first thing I check when I got this error was to check if libjpeg was installed. 
Lets try this

sudo apt-get install libjpeg libjpeg-dev
sudo apt-get install libfreetype6 libfreetype6-dev

download jpeg source

tar -xzvf jpegsrc.v8c.tar.gz
cd jpeg-6b/
./configure
make
sudo make install

So download Python Imaging Library 1.1.7 Source Kit (all platforms) 

The after run the setup.py install, check if the support was ok

--------------------------------------------------------------------
*** TKINTER support not available (Tcl/Tk 8.5 libraries needed)
--- JPEG support available
--- ZLIB (PNG/ZIP) support available
*** FREETYPE2 support not available
--- LITTLECMS support available
--------------------------------------------------------------------

If not, in setup.py in PIL I had to change the path of :

JPEG_ROOT = None
ZLIB_ROOT = None

to

JPEG_ROOT = libinclude("/usr/")
ZLIB_ROOT = libinclude("/usr/")