User:NYKevin//

>{{BASEPAGENAME}}< gives >NYKevin/<

>{{SUBPAGENAME}}< gives ><

So apparently this page has no name, and neither does its immediate parent. Want proof? Look at the subpage breadcrumbs. It gets even more interesting if you create a page called e.g. Wikipedia:/ (don't actually do it, you'll just annoy the admin who has to clean up after you). Then {{BASEPAGENAME}} gives the empty string. So when you're making templates, watch out! Weird things like this can and do happen. On a related note, you can't link to [[//]]; you have to link to // (expressed in wikitext as [[://]]).