Interesting new look. I was excited about getting HTTP Live Streaming support in VLC, however, it seems to be broken for sliding playlists, which is surprising since I thought it hooks into libav* for a lot of that stuff, which does have support.
I'll see what I can do, unfortunately generating a sample sliding window playlist isn't the easiest thing in the world to do (I can't post the feed I'm testing it with). Looking at access logs it appears to have something to do with reloading the playlist, as the access intervals don't look like Quicktime's or an iPhone's.