1. Wikipedie:Co je článek
The page seems to have been deleted successfully by now.
No. You can look http://cs.wikipedia.org/w/wiki.phtml?title=Speci%C3%A1ln%C3%AD:Allpages&... It is still there. Even I am sysop, I cannot delete it. In the short pages it used to have no zero size (I cannot to check it now). In my view the problem is bad namespace.
2. Book sources I still don't understand how to change it in Czech wiki without changing LanguageCs.php.
Vít Zvánovec