I have uploaded 8.8.5 beta 14.1. This should help with these 404 problems. But I have discovered two further problems (one with the XSPF player and one on the podPress general settings page) which are still in place. I had not much time today. That is why it is 14.1 and not 15. When I fix these 2 bugs I will upload beta 15 (probably in the next 3 days).