Latest upstream release: 0.9.0 Current version in Fedora Rawhide: 0.8.1 URL: http://dl.matroska.org/downloads/libmatroska/ It's required by mkvtoolnix 3.4.0.
Oops, look like I've just unintentionally tested my adding of libmatroska to the upstream monitoring tool... *** This bug has been marked as a duplicate of bug 595657 ***