The v3.17.1 release is a patch release that addresses a regression in the v3.17.0 release. See the [v3.17.0 release notes](https://github.com/openlayers/openlayers/releases/tag/v3.17.0) for details on upgrading from v3.16.
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## Fixes
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* [#5548](https://github.com/openlayers/openlayers/pull/5548) - Fix CHANGETYPE in ol.control.FullScreen ([@GaborFarkas](https://github.com/GaborFarkas))