For some axes ranges, annotations will not be drawn

ax = gca()
ax.set_ylim([0,.3])
ax.annotate('.5',(.1,.5),textcoords='axes fraction' ,weight='bold',fontsize=14 )
ax.annotate('.1',(.1,.1),textcoords='axes fraction' ,weight='bold',fontsize=14 )
draw() # only .1 will show up
ax.set_ylxm([0,3])
draw() # both will show up

May be related to issues #1310 and #403

In [17]: matplotlib.version
Out[17]: '1.2.0rc2'

QT4Agg with PyQT4

edited to add links