The buttons for acting upon a question or answer — share, edit, close, flag, sometimes others — are presented as tiny gray words. Here's what you see reading this question right now, for instance:
It is easy to overlook the buttons, and even if you do notice them, there are no visual cues to tell you that they are clickable. This is both a user experience failure and an accessibility failure. Based on my experience trying to salvage insufficiently detailed questions on Stack Overflow, I'm pretty sure that many newcomers to the site don't realize they can edit their questions, so they try to respond in the comments instead, even when what they've been asked to do is, like, provide more code. And if I take my glasses off, well, I can't read the site at all, but this row of buttons in particular becomes a gray smudge that might be mistaken for a horizontal rule or something.
For questions, I think it might also help to move the tags somewhere else, maybe right under the title. The design of tags varies from subsite to subsite, but often they look a lot more like buttons than these actual buttons do, so they distract you from them.
Previous request along the same lines: "Make share, edit, etc buttons larger to enhance new user experience" but merely making them larger is not enough; they should ideally look like buttons. At the very least, please make them blue, which is something of a "this is clickable" cue. (Note how "Add a comment" is already blue, and also farther away from the row of tags, so it isn't nearly as eclipsed by them.)