pierre dumuid observed in sword-devel on 02 Feb that in his new osis-based commentary, using xrefs thus...
<reference osisRef="Ephesians.1.1">Ephesians 1:1</reference>
...the links do not work. they display correctly as underlined/colored links, but clicking them does not in fact send the verse to the verse list or put the verse into the previewer.
i for one do not know enough about osis yet to know whether he has actually constructed correct references for GS to interpret; however he claims that WinSword and BibleTime react properly to it.
a copy of the module in question is in hand, but it is not (yet?) considered generally redistributable, so i'm not uploading it with this bug report.