pydata/pandas — pull request #5859 by jreback (2014-01-05 15:26:43+00:00)
Title: BUG: Series.sort will raise a ValueError (rather than a TypeError) on sorting an object that is a view of another (GH5856)

closes #5856
related #5853

API: DataFrame._ixs will properly record a cache change (similar to _get_item_cache)