xowiki 0.27 is in cvs head. This change is an important but tedious upgrade, since it aligns xowiki (and the content repository stuff in xotcl-core) more closer to the datamodel of the oacs content repository. In essence, we use now cr_items.name instead of cr_revisions.title to label items and therefore, we can use cr_revisions.title instead of xowiki_page.page_title to provide titles for xowiki pages. The upgrade script copies user-provided page_titles to the title field, which is presented in the forms. page_title is still in the datamodel, but it is deprecated and will be removed in future versions.
Textually this is a big change (plain diff is more than 1200 lines), and it is unfortunately quite easy to overlook a potential bug. however, i am most probably myself the biggest xowiki user, for me everything seems ok.