Sorry, 0.12.0 was throwing an `AssertionError`, un-patched trunk throws a `ValueError`.  I'll just update to catch either and fail.

The error with misaligned timezones caused a mismatch in bins and labels in the `group by` triggering the AssertionError/ValueError.

Here's running on 0.12.0:
```
In [7]: result2 = s.resample('T',kind='period')
---------------------------------------------------------------------------
AssertionError                            Traceback (most recent call last)
<ipython-input-7-67f35a9ba9ef> in <module>()
----> 1 result2 = s.resample('T',kind='period')
[...]
${VENV_DIR}/local/lib/python2.7/site-packages/pandas/lib.so in pandas.lib.SeriesIndex.__set__ (pandas/lib.c:29541)()

AssertionError: Index length did not match values
```

And here's running on trunk:

```
In [5]: result2 = s.resample('T',kind='period')
/root/pandas/lib/python2.7/site-packages/numpy/core/_methods.py:55: RuntimeWarning: Mean of empty slice.
  warnings.warn("Mean of empty slice.", RuntimeWarning)
---------------------------------------------------------------------------
ValueError                                Traceback (most recent call last)
<ipython-input-5-67f35a9ba9ef> in <module>()
[...]

ValueError: Wrong number of items passed 2, indices imply 3
```