Apple Repair Privileges Utility 1.0

is available for download. For Mac OS 10.1.5 only:

"The Repair Privileges utility restores the privileges of Mac OS X system files and Apple-installed software to their default configuration. All previous modifications to the privileges of these files and directories will be lost. While this utility does not change permissions of third-party software (if third-party software has changed Apple-set permissions), that software may not work as expected after using the utility."