Working Rule for AdBlock: google.com##table[class^="G-"]>tbody>tr>td:first-child Rated 5 out of 5 stars
I've used this addon until Google started to switch the class names. For a while, AdBlock Plus helped, but now it seems they generate the class names at random.
Here's the catch-all rule for AdBlock Plus that *should* work longer:
It uses the enclosing table to select the first <td> - independent of it's class name.
I hope this helps some of you and works longer :)