An edit search for an artist uses row IDs, not MBIDs, e.g. http://beta.musicbrainz.org/search/edits?conditions.2.field=artist&conditions.2.operator=%3D&conditions.2.name=%E4%B8%8A%E6%9C%A8%E5%BD%A9%E7%9F%A2&conditions.2.args.0=366431

If I try and pass an MBID, e.g. http://beta.musicbrainz.org/search/edits?conditions.2.field=artist&conditions.2.operator=%3D&conditions.2.name=%E4%B8%8A%E6%9C%A8%E5%BD%A9%E7%9F%A2&conditions.2.args.0=84a99276-f277-47d6-aa8a-dc2edf206af5 it just says "Oops! It seems your search parameters are not correct, please double check your input!".

I was actually trying to do what I suggested in the comments of MBS-3135 as a user script, but I presume the current behaviour means any saved search which includes artists will break if any of those artists are merged.

The same seems to apply to other entities.