While I am enjoying the "new" imgur, I suspect the casual user is not aware of the gallery function making posts public/for comment. I've seen quite a few which from the caption and content really do strike me as stuff uploaded to share with friends, not stuff uploaded for the gallery. I'm wondering if it might be made clearer, perhaps in the note that says "Upload 1 image into the gallery" - maybe change that to "Upload 1 image into the *public* gallery"
This was really long winded, sorry.
Customer support service by UserEcho