Bug 15352 changed the item record link from showing the URL to showing the text defined in the URLLinkText preference. You can now only empty out the pref and affect both bibliographic records and items to undo the change or accept that both show the same text. For the item URLs the use case is often a little different than for the ones in the bibliographic record so it would be nice to have this configurable separately which should also allow to opt for using the old behaviour of showing the URLs as is in the item records.