[liquid217]

Usually that is a sign that the current directshow mpeg decoders are not displaying the frame correctly when using the menu editor. (Usually caused by windvd's decoder) You can try reinstalling DVDAuthorGUI, and selecting the 'GPL Mpeg2 decoder' for installation. This will install a new mpeg2 decoder which works very well with DVDAuthorGUI's menu editor.

You also have the option to install avisynth (avisynth.org), and go to 'tools' and select 'use alt preview decoder'. Using this method, you don't have to install another mpeg2 decoder.

I'm not sure about your audio problem. I would take a guess that your dvd player (or software player) doesn't like the audio format.

If you have any other problems with DVDAuthorGUI, feel free to email me at the address on my (DVDAuthorGUI's) homepage.