Like Barely, my stats never worked right here...
I had mentioned similar issues in the past on other threads, as well. I attempted to do everything that is recommended in the other threads, to no avail. And it seems until there is better integration with Podpress, I'll not see effectiveness. I finally just turned all the efforts for Blubrry stats off until I can see some better integration.
Unfortunately, since Libsyn pulls stats and Feedburner pulls stats, that sucks up the opportunity to use the Blubrry stats anyway (which is what I really want to do). I have been using the Podpress stats instead because I seem to get better tracking of the actual file usage through them. If my show wasn't two years old and the feed at Feedburner fully established I'm hesitant to turn it off and direct my users to the "pure" feed.
ADDENDUM: I forgot to mention that when I attempt to use the URI redirect -- it KILLS my media files. Nothing comes through the feed and they are not available in my page players, either. This is obviously NOT an option or a fix for me.