- Return HTTP status code `400` for all validation errors when creating or updating a member instead of sometimes `422` error. [!9523](https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/9523)
- Remove `GET /groups/owned`. Use `GET /groups?owned=true` instead [!9505](https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/9505)
- Return 202 with JSON body on async removals on V4 API (DELETE `/projects/:id/repository/merged_branches` and DELETE `/projects/:id`) [!9449](https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/9449)
-`projects/:id/milestones?iid[]=x&iid[]=y` array filter has been renamed to `iids`[!9096](https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/9096)