This is just some feedback, because it should be easy enough for me to change it on my own forums:
The lack of padding there is fine. It might just be me, but every time I click the menu, my brain says, “something doesn’t look right.” I think it’s more the border radius than the padding, because it looks like the box surrounding the user icon has a 4px radius, but the menu has 2 * 4px radius. The buttons in the sidebar are also 4px. I think it would look better if the borders of the menu are 4px so that it’s aligned with the rest of the page.
(Your screenshots looks like everything might be 8px, but I think it looks too rounded. Unless I’m mistaken, when I log out I see 8px radius but when I’m logged in I see 4px. I’ve tried in a few browsers.)
Edit: we might be seeing different things. It isn’t a big problem, because I can override the variable, but it’s that top left corner that looks off to me whenever I click it on my sites. Maybe the bigger rounding puts the edge too close to the text, which is why I mentioned the padding in my previous comment.
