I pulled down your xcms-ui package and installed in on a HEAD development instance. Mounting and requesting the index page results in an error that shows that it (index.vuh) is passing the wrong number of args to "content::init". I assume there are some core changes to CR that should accompany xcms-ui? Or, maybe my dev instance isn't configured right.
wrong # args: should be "content::init urlvar rootvar ?content_root? ?template_root? ?context? ?rev_id? ?content_type?"
"content::init -resolve_index "t" -revision "live" the_url the_root $content_root $template_root $context $revision_id "
(file "/devel/s8002/packages/xcms-ui/www/index.vuh" line 1)