The long red background that extends until the end of the artist comment should probably be changed so it only reaches the end of the name.
Is this issue still valid? The link in the description refers to an edit that does not have any red highlighting at all, and lot of things have changed since NGS rc1.
It is, actually: http://test.musicbrainz.org/edit/17592932
On the linked page, this is because it's a table; the "Joka (German rapper)" is what's setting the width. Presumably that cell could be set to a colspan though, at the least. I'm attaching some files to show how reosarevok's linked page looks before and after adding colspan=2 to the top cell.
Looks like Add Artist edits just have the top row in a completely different table, so I'll just do that here.