In dark theme the post # is very difficult to distinguish.
Also, the font size for that number is very large. Considering it's rather low relevance, I feel it could be a lot smaller not to draw this much attention.
![](http://i.imgur.com/H4mWOgwl.jpg)
And, when previewing a post before posing, the preview text is black on dark-grey:
![](http://i.imgur.com/c5nbND6l.jpg)