What's new in 1.3.1 (July ??, 2021)

These are the changes in pandas 1.3.1. See :ref:`release` for a full changelog including other versions of pandas.

Fixed regressions

Pandas could not be built on PyPy (:issue:`42355`)
:class:`DataFrame` constructed with an older version of pandas could not be unpickled (:issue:`42345`)
Performance regression in constructing a :class:`DataFrame` from a dictionary of dictionaries (:issue:`42248`)
Fixed regression in :meth:`DataFrame.agg` dropping values when the DataFrame had an Extension Array dtype, a duplicate index, and axis=1 (:issue:`42380`)
Fixed regression in :meth:`DataFrame.astype` changing the order of noncontiguous data (:issue:`42396`)
Performance regression in :class:`DataFrame` in reduction operations requiring casting such as :meth:`DataFrame.mean` on integer data (:issue:`38592`)
Performance regression in :meth:`DataFrame.to_dict` and :meth:`Series.to_dict` when orient argument one of "records", "dict", or "split" (:issue:`42352`)
Fixed regression in indexing with a list subclass incorrectly raising TypeError (:issue:`42433`, :issue:`42461`)
Fixed regression in :meth:`DataFrame.isin` and :meth:`Series.isin` raising TypeError with nullable data containing at least one missing value (:issue:`42405`)
Regression in :func:`concat` between objects with bool dtype and integer dtype casting to object instead of to integer (:issue:`42092`)
Bug in :class:`Series` constructor not accepting a dask.Array (:issue:`38645`)

Fixed bug in :meth:`DataFrame.transpose` dropping values when the DataFrame had an Extension Array dtype and a duplicate index (:issue:`42380`)
Fixed bug in :meth:`DataFrame.to_xml` raising KeyError when called with index=False and an offset index (:issue:`42458`)

.. contributors:: v1.3.0..v1.3.1|HEAD