The first solution requires the user to perform an Archive and Install installation of Leopard. The existing Mac OS X system files would be moved to a folder named Previous System, and then the OS would be installed once again. However, such a measure might also require the user to reinstall various software, such as applications or plug-ins, Apple points out.
The second solution is aimed at experienced users who know their way with the Terminal and enables them to remove application enhancement software:
“Start up in single-user mode by holding Command-S after restarting the computer.
Execute these commands, each on a single line:
/sbin/fsck -fy /
/sbin/mount -uw /
Execute these commands, each on a single line. Important: Type each command carefully, misuse of the rm command may damage other files.
rm -rf /Library/PreferencePanes/Application\ Enhancer.prefpane
rm -rf /Library/Frameworks/ApplicationEnhancer.framework
rm -rf /System/Library/SystemConfiguration/ApplicationEnhancer.bundle
rm -rf /Library/Preferences/com.unsanity.ape.plist
Of course, there is a slim chance that the second option just won’t work. If so, users are encouraged to try out the Archive and Install installation.