Character Encoding is screwed?

I've noticed that when you post certain characters using the desktop application, they don't translate well through to your pownce page. Examples as follows:

In this note I posted the url http://www.last.fm/music/Mike+TV (notice the plus in the url between Mike and TV), whereas on my pownce page, it's showing as http://www.last.fm/music/Mike%252BTV, which is an invalid link.

In this note I posted the text "or available for purchase seperately for £4" via the desktop application. When I look at the note through my browser / rss feed, the text reads as "or available for purchase seperately for ?4" and the pound sign hasn't been recognised.