when editing a relationship, e.g. http://test.musicbrainz.org/edit/relationship/edit?returnto=http%3A%2F%2Ftest.musicbrainz.org%2Frecording%2F26c39f9d-b37c-45eb-908a-694b86a778df%2Frelationships&type1=recording&type0=recording&id=38804

or using guess case on a work, e.g. http://test.musicbrainz.org/work/b41cddb8-7a32-3e13-bf9a-8094f10ff4ab/edit

the buttons are inconsistently styled when you hover over them. see the attached image, the first is when I'm not hovering, the second is when I am