On my Logitech Revue and Boxxe I randomly have the audio drop out completley. The only way to get the audio to come back is to restart the stream by switching quality. It dosn't seem to matter which quality setting I use. I have a 30MB fios connection between both locations so I don't think it is a bandwith issue. I never have problems with the web player on my mac. Is this a know issue? I also now have a brand new slingbox HD since my old one died.
So the audio on your connected devices drops out completely? Sorry to hear that is happening to you, here is a great place to start trouble shooting the issue.
Slingbox audio issues: Basic troubleshooting, is the article that will assist you through your troubles.
Sling Moderation Team