Andem - 5:43 pm on Sep 21, 2012 (gmt 0)
I haven't seen this mentioned yet, but the new feedback link is much more interactive and easier to use. You no longer have to browse through tons of different options in order to find the correct form.
It also now allows you to highlight and blackout the page you saw SPAM or inappropriate results on.
I think Google might be getting a little more serious about using user feedback in its rankings, but perhaps that might be going a little far in terms of assumptions.
Worked in Firefox while logged in, not in Chrome while logged out.