value_counts() is changing dates

Code:

    print fl['TurnOnDate'].head()
    print 'dtype:'
    print fl['TurnOnDate'].dtype
    print fl['TurnOnDate'].value_counts().head()

Result:

2723 2003-10-01 00:00:00
2841 2011-08-01 00:00:00
2855 2004-12-01 00:00:00
2941 2010-08-01 00:00:00
3019 2005-11-01 00:00:00
Name: TurnOnDate
dtype:
datetime64[ns]
1970-01-23 00:00:00 4
1970-01-19 00:00:00 4
1970-01-21 00:00:00 2
1970-01-22 00:00:00 2
1970-01-20 08:00:00 2

[jreback]

this is fixed in 0.11 #3003

Thanks