the current version of Cakephp (2.x) renamed the config folder to Config....

the current version of Cakephp (2.x) renamed the config folder to Config. adding core to the list of files to ignore as this contains security salts.

CakePHP.gitignore

 tmp/*
-config/database.php
+Config/core.php
+Config/database.php
 app/tmp/*
-app/config/database.php
+app/Config/core.php
+app/Config/database.php
 !empty
\ No newline at end of file