Islandora has been updated to version 11.3.1. This minor release addresses a bug in the 11.3.0 release - all users of Islandora 11.3.0 should update to 11.3.1. More details can be found on the release notes and downloads page.
Please report any issues to the google developer or users lists, or at our JIRA.
Please read the documentation carefully before updating as this version may cause issues with previously installed versions of Islandora - particularly versions released prior to Islandora 11.2.0. All modules should be updated simultaneously to keep everything in sync. If you encounter an undocumented issue, please let us know so that we can help build and document a complete upgrade path.