What's new in 1.4.3 (April ??, 2022)

These are the changes in pandas 1.4.3. See :ref:`release` for a full changelog including other versions of pandas.

Fixed regressions

Fixed regression in :meth:`DataFrame.nsmallest` led to wrong results when np.nan in the sorting column (:issue:`46589`)
Fixed regression in :func:`read_fwf` raising ValueError when widths was specified with usecols (:issue:`46580`)
Fixed regression in :meth:`.Groupby.transform` and :meth:`.Groupby.agg` failing with engine="numba" when the index was a :class:`MultiIndex` (:issue:`46867`)

.. contributors:: v1.4.2..v1.4.3|HEAD