This is maybe related to bug 17276: When moving a page over a redirect, the new created redirect (at the old title) isn't working, probably stored with page_is_redirect = 0 (see url).
Apparently the behavior has been introduced with last scap.
Version: 1.15.x
Severity: normal
URL: http://en.wikipedia.org/wiki/Ang_Babaing_Hinugot_sa_Aking_Tadyang