Some songs aren't working in last.fm radio -- where are the moderators?

I've been a subscriber for a year and a half now and I've experienced some problems with poor quality songs or weird versions.

I love the last.fm radio, but it's hard to get in touch with the people who can fix this stuff.
It's frustrating.

From the top of my head, I have issues with the following songs/albums:

- long day
Sounds choppy. From the comments in the song, I'm not the only one who has some problems buffering this particular track: it always gets cut in the same points.

- Headstrong
Songs *always* skip after the first ~5 seconds.

- Waiting On The Wolrd To Change
It has a Obama speech at the beginning and it's really annoying. I want music, not politics. Don't mix things!

- Contagious
It's an acoustic version and it's not as good as the original one. This is not a *big* issue.

- Slim Shady
It has no voice track!


Ideas?