set_xticks does not print label on left most side of chart

[cancan101]

For example in this case:

d_test = pd.DataFrame({'v':[1,2,3,4]},
                      index=[pd.Timestamp("2014-1-1 15:00"),
                             pd.Timestamp("2014-1-1 16:00"),
                             pd.Timestamp("2014-1-2 15:00"),
                             pd.Timestamp("2014-1-2 16:00")])
fig = ts_charting.figure(1)
d_test.fplot()
fig.set_xticks('D')

a label for 2014-1-1 is not printed.