Women are not equal in status to men. One solution is to increase the status of women (ie defining, establishing, and defending equal political, economic, and social rights and equal opportunities "for women").
That's good as far as it goes.
However, it becomes a problem when increasing political and social power for women becomes a goal in and of itself, divorced from the issue of equality with men.
Additionally, it becomes a problem when increasing political and social power in areas where men have reduced status (primarily in child-related matters such as parenting, child-care professions, and grade-school education) is seen as inherently contrary to feminism.
Intelligent feminists realize that reducing gender preferences in all areas, even those that traditionally favor women, supports the goal of gender equality, and often support it. Gender feminists just see it as an attack on a female power base, and often oppose it.
As for pornography. As I understand it, a lot of mainstream pornography is extremely sexist in its approach and execution. To the extent that those who watch pornography are encouraged to devalue women by the relationships between men and women portrayed therein, it's reasonable for feminists to oppose it.
Then again, a lot of mainstream action films suffer exactly the same problem, and could fall under exactly the same criticism. To the extent that porn is really just mirroring the same sexist depictions of women found elsewhere in film, it certainly should not be singled out as though its explicit sexuality was somehow also inherently anti-woman.