easydigitaldownloads/Easy-Digital-Downloads — pull request #2051 by mvaker (2014-02-22 21:44:43+00:00)
Title: Added ob_flush() and flush() to edd_readfile_chunked()

I was getting a 0 Byte download when downloading a "large" file (10Mb).
After trying some things and modifying some php variables I was getting the same issue. But when adding this two lines problem was solved and I was getting the correct size download.