User blog comment:Antony1197/Super annoying courier glitch/@comment-1992639-20120622185835/@comment-96.251.77.204-20120629205433

The bug doesn't cause all dialogue to break. Only those lines which mods have actually edited in some way. Lines that are not edited will not be affected by this, and after some careful research, all that's actually happening is the audio is failing to play and the lip animations don't process. Turn on your subtitles, they still show up. Wait through them as normal, and the Papyrus script fragments are still executing.

This won't really help though with audio spoken outside the actual dialogue interface. Those will simply fail to play at all, which is why the courier thing becomes such a major annoyance.