Description:

If I try to import the main matplotlib module in a python console or in an application it returns this error.

>>> import matplotlib.pyplot
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "/usr/lib/python3.3/site-packages/matplotlib/pyplot.py", line 97, in <module>
_backend_mod, new_figure_manager, draw_if_interactive, _show = pylab_setup()
File "/usr/lib/python3.3/site-packages/matplotlib/backends/__init__.py", line 25, in pylab_setup
globals(),locals(),[backend_name])
File "/usr/lib/python3.3/site-packages/matplotlib/backends/backend_tkagg.py", line 8, in <module>
import tkinter as Tk, tkinter.filedialog
File "/usr/lib/python3.3/tkinter/__init__.py", line 40, in <module>
import _tkinter # If this fails your Python may not be configured for Tk
ImportError: libtk8.5.so: cannot open shared object file: No such file or directory

The problem affect only python3 and it's appeared with the latest rebuild (1.2.0-6) .

Additional info:
* package version(s)
python-matplotlib 1.2.0-6


Steps to reproduce:

Open a python console and take the command:
>>> import matplotlib.pyplot