This is off-topic, but still worth following, for privacy’s sake.
First, read this post by John Gruber (it’s short). Gruber’s conclusion there disturbed me, as I have various Twitter tools here on the site that I think are useful. But he’s right.
So, read this post on how to stop Twitter from tracking you, if you don’t have “Do Not Track” enabled in Firefox, Safari, IE9 or Opera (here is one area where Chrome is lagging). Ghostery is particularly useful.
As I said, I think Twitter tools for websites can be useful, but if you’re not explicitly using them, you shouldn’t be tracked just because you visited a site. This is my way of helping in that regard.