I can't for the life of me create links to recordings from works. (The other way around works OK)
Steps:
1) Go to http://musicbrainz.org/work/e37bb09e-e8ff-4eb3-84d5-327f51caba57
2) Click "Relate to..."
3) Search for Recording, "Non-Entity"
4) Try and select a result.
With either advanced or direct search the search results menu does not disappear when I select the recording. This makes it impossible to use as if I click outside the search results onto the "relate to" overlay; it deselects the recording (goes red rather than green).
Rephrasing bug title a bit; sometimes I can click outside the search results inside the "relate to" box and have it stay "green" - but not always. I can't quite work out the circumstances it does or does not lose the recording association though.
In any case, when you select a recording it should close the results as it normally does.