Thread:Project:Support desk/Bad title error on special page - cannot delete

One of my users encountered a bunch of pages on my wiki that return a Bad title error:


 * SgWiki :: Singapore's Wiki:About
 * SgWiki :: Singapore's Wiki:Community Portal
 * SgWiki :: Singapore's Wiki:General disclaimer
 * SgWiki :: Singapore's Wiki:Help
 * SgWiki :: Singapore's Wiki:Image use policy
 * SgWiki :: Singapore's Wiki:Protected page
 * SgWiki :: Singapore's Wiki:Searching
 * SgWiki :: Singapore's Wiki:User preferences help
 * SgWiki :: Singapore's Wiki talk:About
 * SgWiki :: Singapore's Wiki talk:Community Portal
 * Talk:SgWiki :: Singapore's Wiki:Community Portal

I am not sure how the pages got there in the first place but they are linked from the 'All pages' list:

http://sgwiki.com/index.php?title=Special:AllPages&from=Rumbia_LRT_Station&to=Transgenderism_in_Singapore

Any ideas?