Why must things not work?

It doesn't seem to happen all the time, but it's certainly happening a lot. At the moment, the javascript feed that shows my recent tweets over on the left is coming up blank (or, rather, the JSON feed). Twitter itself loads fine and I can tweet all I like, so I can only assume it's something wrong with my internets.
At the same time, my last.fm artist chart thing down below my profile icons has all sorts of problems. Sometimes it says I need to update Flash player, sometimes it says I haven't played anything recently when I have, and other times such as now it shows what I've been playing, but says "undefined times". Gah!