If the nice guy was the stereotypical shlub who was used by his date, stuck with the bill but never got a kiss at the end of the evening, the nice woman is the professional version. Caring too much about her colleagues and company, she fails to negotiate effectively for a better salary or promotion, becoming bargain rate labor in the hands of a Machiavellian management.
There are those who would use this as proof positive that if women are going to be altruistic, less aggressive, and, generally speaking, nice, then complaining about the wage gender gap is hypocritical. The Ignorant Men Holding Hands and Hating Feminists are a classic example (albeit an extreme disreputable one) of a group that seeks to use the fact that women, as a gender, tend to be less aggressive than men, against us, somehow equating that nice-ness with weakness to be simultaneously derided and preyed upon. Lois Frankel has authored an entire series of titles beginning with "Nice Girls dont... <insert success here>" designed to toughen us up. She's not alone - the immediate, micro solution to being taken advantage of is fairly obvious - toughen up and stand up for yourself - or you deserve to be taken advantage of.