This crappy Bookmark icon !

For the past couple of months I have (suddenly ?) noticed that if my cursor touches the bookmark icon in the top-left corner, then everything freezes until the aforementioned useless piece of tat makes its appearance , disappears and I can carry on.

Worse is perhaps that it takes quite a few seconds until this thing appears.

Has something happened recently to introduce this blight or did I lean on the keyboard and accidentally select something ?

If yes, please tell me how to kill it.

Nothing has changed, it has been on a good while.

If however you don't use it which I am assuming is the case you can disable it here:

http://www.diynot.com/network/user_account_advanced.php

Set the bottom option 'Enable forum AddThis Bookmark/Sharing buttons' to 'No' and save changes.