Yes I am only trying to set it to loaded and working plugins.
ikiwiki version 3.20101129
+
+> I've tested `default_pageext` with 3.20110124, and it works fine.
+>
+> It seems to me from what you describe that you expect
+> it to have an effect when you go and edit an existing page.
+> That's not what it's for, it only chooses the default used
+> when creating a new page.
+>
+> Closing this bug as apparent user error. --[[Joey]] [[done]]