- Polls without end date are not hidden anymore. - Information about blocked servers is available via /api/v1/instance/domain_blocks API endpoint. It is only accessible to authenticated users, but can be made public with mitra update-config filter_blocklist_public true. - Better support for audio uploads (AAC, M4A, WAV and OGG) (contributed by @caohuak). - Improved responsiveness under the load on machines with a single CPU core.