# What’s new in 1.3.5 (December 12, 2021)

These are the changes in pandas 1.3.5. See Release notes for a full changelog including other versions of pandas.

## Fixed regressions

- Fixed regression in `Series.equals()` when comparing floats with dtype object to None (GH44190)

- Fixed regression in `merge_asof()` raising error when array was supplied as join key (GH42844)

- Fixed regression when resampling `DataFrame` with `DateTimeIndex` with empty groups and `uint8`, `uint16` or `uint32` columns incorrectly raising `RuntimeError` (GH43329)

- Fixed regression in creating a `DataFrame` from a timezone-aware `Timestamp` scalar near a Daylight Savings Time transition (GH42505)

- Fixed performance regression in `read_csv()` (GH44106)

- Fixed regression in `Series.duplicated()` and `Series.drop_duplicates()` when Series has `Categorical` dtype with boolean categories (GH44351)

- Fixed regression in `GroupBy.sum()` with `timedelta64[ns]` dtype containing `NaT` failing to treat that value as NA (GH42659)

- Fixed regression in `RollingGroupby.cov()` and `RollingGroupby.corr()` when `other` had the same shape as each group would incorrectly return superfluous groups in the result (GH42915)

## Contributors

For contributors, please see /usr/share/doc/contributors_list.txt or https://github.com/pandas-dev/pandas/graphs/contributors