We've been using this plugin (successfully) for handling downloads from our church website (both pdf files and mp3 files). We have had some reports of problems with the mp3 files and iPads/iPhones. The mp3 file starts to stream but only plays the first 5 mins then starts to play again. No idea if the issue is with the plugin or not - but can't find any references to this problem at all and don't know anything about iPads/iPhones!
One friend suggested "I think your server is not giving the iOS devices enough information to keep on downloading into the buffer. For instance I find that I cannot pause the stream at all either."
Appreciate any help/suggestions for a relative beginner!