With every new open file (song), six DIR filehandles stay open Whenever new file is selected to play, the number of DIR filehandles increases by six. Eventually parole rejects to play the next song because it reaches too many open files. Please look at https://bugzilla.redhat.com/show_bug.cgi?id=963428 to see all details about this behavior.
Thanks for the catch, I just pushed a fix for this to git master. We'll also backport that fix to the next stable release of the 0.5 series.