Can't download mp3 with W3 Total Cache activated. It appears to work but I just a small mp3 file that is acutally a text file with the following error in it.
Fatal error: Unknown: Cannot use output buffering in output buffering display handlers in Unknown on line 0
The mp3 files are quite large - over 35M
The path for the download is in the is form - http://www.haxbyandwiggintonmethodistchurch.org.uk/sermons/?download&file_name=16-9-12am.mp3