Ghostery has started to hide reCaptcha check boxes. Other than that, it seemed to work nicely, but that changed it from nice to annoying, especially since you won't even know that there's one that's supposed to be there to be checked! Deleted.
UPDATE: Ghostery said the problem was fixed. It has lessened, but it is not fixed. Too bad they don't know how to do a whitelist. Deleted again.