All Omeka.net sites have been upgraded to the latest version of Omeka, 2.4. The major improvement with this version is better handling of media files, which you can read about here. To keep up with the changing browser support landscape, Omeka.net now uses HTML 5’s audio and video tags when embedding audio and video.
Although this change generally means better media support on newer browsers, it may mean worse support on older ones, especially for older video formats. If you do encounter any issues with the display of your media files, please let us know.