-However, when I make a change via the CGI (which has been created by the last setup run), it applies the default ``page.tmpl`` file to all pages it updates.
\ No newline at end of file
+However, when I make a change via the CGI (which has been created by the last setup run), it applies the default ``page.tmpl`` file to all pages it updates.
+
+> This issue can arise in at least two ways:
+>
+> 1. A permissions problem with the templatedir that prevents ikiwiki from
+> accessing it. If it can't access it, it silently falls back to using
+> templates from the default directory.
+> 2. A templatedir that doesn't have an absolute path. In this case ikiwiki
+> will look relative to *somewhere*, which will sometimes work and
+> sometimes not. Clearly not a good idea.
+>
+> So far that's the only ways that I can see that this could happen.
+> It would be possible to make ikiwiki try to detect these sorts of
+> problems; it could check if the templatedir exists, and check that it's
+> readable. This would add some extra system calls to every ikiwiki run,
+> and I'm not convinced it's worth it. --[[Joey]]