Yup, it seems this problem (face-blindness or prosopagnosia) is fairly common among Aspies....I definitely have it.
In fact if you look down the list of topics in this "General Discussion" forum, you will see one headed "Help! Who are you?" where I introduced the same subject and got quite a few replies, which might interest you too. (The topic quite a way down now, easy to miss!)
In my case, although (looking back) I always found it difficult to reconise people, but it got much much worse after I suffered a brain haemorrhage - which required surgery - some years ago. I remember describing the problem to my surgeon, wondering if he would think I was imagining it. But he told me that it was a recognised condition, and that considering the area of the brain where I had required surgery, he was not at all surprised at my symptoms (unfortunately. the bleeding occurred close to the area of the brain that is involved in face-recognition). I asked if the problem would ever get better, and he told me no; I had it for life, and would have to develop other ways of recognising people (voices, movements, mannerisms etc...even temporary things like hairdos and clothes.)
Social situations are difficult enough for Aspies wothout the added coplication of not remembering who is who! I have even failed to recognise my mother and my son when I met them unexpectedly where I did not expect to see them. At first, people found it hilariously funny that I couldnt recognise faces ... but eventually they realised it was no joke!