Aspyr Media today released free patches for both Sid Meier’s Civilization IV and its expansion pack, Civilization IV Warlords. Some of the changes in Civilization IV 1.61 Rev B include: adds cross-compatibility with PC’s through Gamespy; fixes blackscreen window when loading game from tutorial on an Intel Mac; and numerous other bug fixes. Civilization IV: Warlords 1.0 Rev B contains over 100 bug fixes and changes.