I've just completed a project incorporating only slides, no video, and ac-3 audio totaling 330 minutes. Everything builds fine but when I try to add 1 stream of subtitles I get the "Muxer bitrate too high" message. The total size of the project is only 1.4g and I have tried lowering the bitrate in Preferences to its minimum. Surely adding just 72kbs of subtitles shouldn't cause this problem. If anyone has any ideas I would be eternally grateful!