I had not planned to make any additional releases before GHC 8.2, but bugs forced my hand. In particular, Tom Smalley discovered major bugs in Data.IntMap.restrictKeys and Data.IntMap.withoutKeys. A mistake I made adding those functions to the test suite prevented the problem from being discovered. This affects both 0.5.8.1 and 0.5.9.1, both of which are now deprecated. I believe both the functions and the test suite are now working as intended. In a less frightening bug fix, Ryan Scott fixed a discrepancy between the Show1 instance for Data.Tree and its Show instance. This affected version 0.5.9.1. I also fixed misdirected Haddock links in 0.5.9.1. Version 0.5.10.1 comes with one new feature: Data.Sequence has a MonadZip instance. Thanks also to Simon Jakobi for removing the meaningless stability annotations. David Feuer