http://musicbrainz.org/release/42b32072-85f3-4be0-8f0c-a39beed5614b/annotation/483495 gives the annotation.

http://musicbrainz.org/release/42b32072-85f3-4be0-8f0c-a39beed5614b/annotation/48349 says "the page you're looking for does not exist" (which might be improved by it saying something about annotations specifically and directing the user to http://musicbrainz.org/release/42b32072-85f3-4be0-8f0c-a39beed5614b/annotations )

http://musicbrainz.org/release/42b32072-85f3-4be0-8f0c-a39beed5614b/annotation/edit just ISEs because edit isn't an integer.

Admittedly, it's a minor issue, but one we might as well fix I guess.