Looks like the question I posed yesterday was also asked in the discussion section of Slate.com’s XX Factor Blog, located here. And, like here, there have been no specifics (or even generalities for that matter) stated. A person did point out that Ferraro gave one example, and it was when Obama said Clinton was like Annie Oakley when she talked about her gun experience. I’m not sure how that’s sexist, unless comparing a woman to a woman is sexist in itself.
It sounds like this is yet another “impression” issue. It was created out of nothing, but has taken hold amongst a not-too-small number.