Change file permissions for system/core/*.php and system/database/DB.php so that they don't differ from the rest
diff --git a/system/core/Benchmark.php b/system/core/Benchmark.php
old mode 100755
new mode 100644
diff --git a/system/core/CodeIgniter.php b/system/core/CodeIgniter.php
old mode 100755
new mode 100644
diff --git a/system/core/Config.php b/system/core/Config.php
old mode 100755
new mode 100644
diff --git a/system/core/Exceptions.php b/system/core/Exceptions.php
old mode 100755
new mode 100644
diff --git a/system/core/Hooks.php b/system/core/Hooks.php
old mode 100755
new mode 100644
diff --git a/system/core/Input.php b/system/core/Input.php
old mode 100755
new mode 100644
diff --git a/system/core/Lang.php b/system/core/Lang.php
old mode 100755
new mode 100644
diff --git a/system/core/Model.php b/system/core/Model.php
old mode 100755
new mode 100644
diff --git a/system/core/Output.php b/system/core/Output.php
old mode 100755
new mode 100644
diff --git a/system/core/Router.php b/system/core/Router.php
old mode 100755
new mode 100644
diff --git a/system/core/Security.php b/system/core/Security.php
old mode 100755
new mode 100644
diff --git a/system/core/URI.php b/system/core/URI.php
old mode 100755
new mode 100644
diff --git a/system/database/DB.php b/system/database/DB.php
old mode 100755
new mode 100644