Several (all?) of my recent edits to Tiki18 page here in dev.t.o send me (user "xavi") to the dev.t.o homepage . That's new, it didn't happen to me months ago (nior in earlier tiki versions).
Update: reproduced similar issue in trunk (from yesterday) Xavier de Pedro
Structured pages on the top-level of the structure (i.e. without parents objects) were redirecting to an empty url. Now they redirect to the page url using the right structure record.