I am using

• matplotlib 1.5.1 installed with pip for Python 3.5.1+ on Ubuntu; and
• matplotlib 2.0.0b1+1708.g5de9c44 built from source for Python 3.5.1 on Scientific Linux 5.8.

Consider the example

import matplotlib
from matplotlib import pyplot

pyplot.xlim(0, 1.2)
pyplot.ylim(0, 1.2)
pyplot.annotate(matplotlib.__version__, (0, 0), (0.1, 1.1), 'data', 'data',
  ha='left', va='top')
pyplot.savefig('lim.png')

With the GitHub version of matplotlib, the last tick (1.2) is missing from both axes. This is a regression because matplotlib 1.5.1 can show both ticks without problem.