I'm going to write my response before I read the thread. Apologies if I repeat something that's been said already.
For me, a women's issue is something that is common to women, or specific to women. A women's issue is something that women can answer, but men could not (except through experience with partners, family members, or friends). A women's issue is also something that women (in general, everyone will be different of course) actually give a shit about.
In an applied sense:
The recent thread about someone's boyfriend's masturbatory habits is not a women's issue, as far as I am concerned. I don't know if it is common for a woman to have a partner who masturbates to that extent, but it is certainly not an issue specific to women (it may also be experienced by single men and by gay couples). Women are not the best ones to be answering the questions in the post - most of the questions in the post are asking about things that women will only have experience with through their partners or friends. Something is not a women's issue just because a woman is asking it.
A few months ago, another thread was moved out of women's issues, I assume because it was not seen to be a women's issue. The OP (a guy) was asking about how he could make first time sex good for the woman he was hoping to sleep with. Although he was obviously hoping for some reassurance that his penis would be a satisfactory size for her, the core of his question was about making a woman's first time enjoyable. As far as I'm concerned, this is certainly a women's issue. It is common to women (every woman on here has had, or will have a first time - I don't think we have any women here who intend a life of chastity). It is specific to women - only women can experience a first time from a vaginal view point. Only women could answer the OP's question from direct experience. And I don't know about the other women, but personally, I care about helping to make a woman's first time less painful and more enjoyable. Just because a thread was started by a man, it doesn't mean it ISN'T a women's issue.
Then you have the questions which should go into the hypothetical 'Ask a Woman' section some of us keep hoping for. These are the threads that aren't REALLY women's issues, but for now, Women's Issues is the most appropriate place for them. A recent example is the 'Big cock vs good body' thread. It's not really a women's issue. I doubt many women sit around saying to their friends 'Oooh, would you rather have a big cock or a good body?'. Where these things sit in a hierarchy of attributes is really not something most women give a shit about, I would think. However, it IS something that only women can answer, and in some ways, it is in our interests for men to know where we stand on the matter. So I really think it's not a women's issue, but with no other appropriate place for it to go, it belongs in Women's Issues.