An 'undefined' page is any page that has been linked to from within Confluence, but that does not yet exist.

Undefined Page Linked From
RubyMine EAP Page: RubyMine Tsubaki Beta (build 139.106) Release Notes (Ruby/Rails IDE Development)
Page: RubyMine 4.0 EAP (build 112.49) Release Notes (Ruby/Rails IDE Development)
Page: RubyMine 4.0 EAP (build 112.219) Release Notes (Ruby/Rails IDE Development)
Page: RubyMine 4.0 Beta (build 112.477) Release Notes (Ruby/Rails IDE Development)
Page: RubyMine 4.0 Beta 3 (build 113.2) Release Notes (Ruby/Rails IDE Development)
and approximately 12 more…