Fixed the bug which was causing abstracts do disappear on a page accessed through a search. It was a trivial bug, but took a while to find because I'd confused myself by leaving and old version of an XQuery file in the tree, alongside a new one with a slightly different name. Doh.
In the process, though, I finally set up a local copy of the site running in my local Tomcat, which makes for easier debugging and dev work.