I have no idea what is causing this to happen, but since upgrading to WP 3.3 a day ago, whenever I click on the New Post link, the following code appears in the text editor when I am in HTML mode:
<div id="ff_peerindex_tooltip"></div> <img src="http://whos.amung.us/swidget/rodfaceplus3.gif" alt="" width="0" height="0" border="0" /><img src="http://bit.ly/sVbNRE" alt="" width="0" height="0" border="0" />
If I am in visual mode, just a broken image appears.
I thought it might possibly have something to do with some kind of conflict existing between 3.3 and the PeerIndex plug-in that I have installed in my Firefox 9.0 browser. However, even if I temporarily disable the PeerIndex plug-in, the above code is STILL appearing in the text editor window whenever I click on the New Post link in the Admin Toolbar.
Has anyone else experienced this, or know what it is, and why it keeps appearing in WP's text editor window?