We are certainly aware of the limitation and we are working on some things. A bit of patience and with some work we may get to the point where you can pixel peep all you'd like.
It's not pixel peeping - if I wanted to do that, I'd download it or open it as above (see Isaac).
I just miss being able to click on the image and get a larger presentation of it without all of the distractions (ie ads and text about stories, etc).
I've noticed it absent for a while but the Heavy Metal image mind me think of it more because as an image, I need to look at all of it and not just the centre of the image. Thus as my eyes start to explore it, they get distracted by ads.
Just wanted to make sure it was a known issue. I'll be patient.