Hi mkyong,
Thanks for clearing this up and sorry my post came across too strong, it wasn’t intended.
We’ve disabled the plugin and removed it now, which was a shame as it did what we need, it was just the issues we had with the 3rd party cookies.
If you find out which one it is, all though it may be more than one, it might be worth warning users.
I’m using a plugin now that doesn’t include Digg, Reddit, TweetMeme, StumbleUpon and Delicious so the issue could be with one or all of those.
Steve