The release editor's recording-association bubble at /release/add#recordings often shifts around vertically as different recordings are selected. It looks like it's aligned with the "Edit" button, which is itself shifted down if the currently-selected recording has a disambiguation comment.

Setting vertical-align: top on the td element that holds the "Edit" button seems like an easy fix for this.

It might also make sense to set the same property on the table cells containing the track (and recording?) names, since they also currently move vertically depending on the row's height.