I have an issue with the color of the text input pointer that is shown in the editor. When you have a dark background it’s almost invisible and I constantly lose track of it. It looks to be the default OSX text input cursor, and has a VERY subtle white outline, but not nearly enough to make it easily visible.
If you compare Atom’s pointer to Sublime Text’s with a dark background, it has a completely white pointer.
It would be nice if Atom customized the cursor for dark backgrounds. I did try to style it using the CSS3 cursor: url() rule in my stylesheet to customize it, but it seems to be ignored(?).
Due to the fact that it’s impossible to take a screenshot that includes the app’s actual pointer, I’m unable to provide you with any, to display the difference.