In one of the six blogs on which I have the new AddThis plugin (v 2.0.6) installed, the buttons are not showing on the index page.
Since the buttons DO appear on a single page, I compared the source codes of index.php and page.php. I found that, on index.php, the initial scripts were missing. So I manually added them, just before the 'content' div.
Now the buttons appear.
Why is this happening in only ONE of my SIX blogs? The other five are A-OK.
If this "bug" gets fixed, please let me know, so I can remove my hack.