I feel like the unrealistic thin image is definetly more the fault of women.  It's almost like the fact that we've said "fashion magazine make girls feel bad about themselves" so many times, that it's become self fulfilling.  I've never said/thought it at all.
I also agree on the whole fat/unhealthy thing.  Curves are great.  I love a woman with a good hourglass, but your body needs to function as it's intended (without diabetes, etc.).  As dangerous as being so thin is, it's even more dangerous to go the other way.
One other thing that I wanted to say in the other thread (which is a little less related to this) is that the porn magazines that I buy don't feature any model-esque women.  Even Playboy or the other mainstream magazines are too fake for me.  I buy more amateur stuff, and my girlfriend actually likes to look at it.  Not only because she thinks it's funny, but also because she can often times say "I look better than that girl" and actually be right.  They feature women of such diverse body types that it can actually be a confidence boost.
Overall, women need to relax about this.  No matter what you look like, there are men out there attracted to it (spend some time on the internet if you don't believe me.  I've actually seen a whole pay website dedicated to women with hairy arms for fucks sake.).