This is London specific, as far as I can tell.
Go to any category or locale page
Get the list of pages in the category/locale
Click on "Pages that link to here" (perhaps this link shouldn't be here ;)
and you get: ======================================= Sorry! Something went wrong. Please contact the Wiki administrator at openguides-london@openguides.org and quote the following error message:
Must supply a node name at /home/earle/downlode.org/perl/lib/CGI/Wiki.pm line 252 Return to the Wiki home page
openguides-london@lists.openguides.org