What's new in 1.5.2 (November 21, 2022)

These are the changes in pandas 1.5.2. See :ref:`release` for a full changelog including other versions of pandas.

Fixed regressions

Fixed regression in :meth:`MultiIndex.join` for extension array dtypes (:issue:`49277`)
Fixed regression in :meth:`Series.replace` raising RecursionError with numeric dtype and when specifying value=None (:issue:`45725`)
Fixed regression in arithmetic operations for :class:`DataFrame` with :class:`MultiIndex` columns with different dtypes (:issue:`49769`)
Fixed regression in :meth:`DataFrame.plot` preventing :class:`~matplotlib.colors.Colormap` instance from being passed using the colormap argument if Matplotlib 3.6+ is used (:issue:`49374`)
Fixed regression in :func:`date_range` returning an invalid set of periods for CustomBusinessDay frequency and start date with timezone (:issue:`49441`)
Fixed performance regression in groupby operations (:issue:`49676`)
Fixed regression in :class:`Timedelta` constructor returning object of wrong type when subclassing Timedelta (:issue:`49579`)

Bug in the Copy-on-Write implementation losing track of views in certain chained indexing cases (:issue:`48996`)
Fixed memory leak in :meth:`.Styler.to_excel` (:issue:`49751`)

Reverted color as an alias for c and size as an alias for s in function :meth:`DataFrame.plot.scatter` (:issue:`49732`)

.. contributors:: v1.5.1..v1.5.2