After the most recent update, it’s not working on ios for me either.
Not the html 5 version. The default flash (web) version.
These guys have a decent skin. Looks current.
http://wordpress.org/plugins/wp-audio-player/screenshots/
Honestly,I don’t think I touched it in a few months. So I don’t really know. I saw something about altering the url on this forum. The downside is I have A LOT of urls to alter. No big deal though. It is free after all.
