<p>Ubuntu 11.04 64bit here, LibreOffice Impress recognized by the plugin, but when adding a presentation, it's red x in the menu. But I can preview and show the presentation fine. Tho I do have a different issue with it, that I had in 1.9.5 on Windows, and didn't realize it until recently, and that is the live display thumbnails don't match up with what's displayed, making it hard to work with the presentation from OpenLP.</p>