Last modified: 2014-07-13 08:19:34 UTC
While some users (mainly admins) are allowed to override the TitleBlacklist, they should know that the title they're trying to create is blacklisted - just like happens with protected titles (non-existent pages with creation-protection).
This was actually just fixed in I0e3c08d026e415c31c792dffbb6bb300c7f1fd9c, and should be deployed to WMF sites with 1.24wmf14.
*** This bug has been marked as a duplicate of bug 13780 ***