WP Plugin Security Check (http://wordpress.org/extend/plugins/wp-plugin-security-check/) the following security warning on Ultimate Security Checker:
eval() detected in ultimate-security-checker/wp-ultimate-security.php
Variable execution detected in ultimate-security-checker/wp-ultimate-security.php
eval() detected in ultimate-security-checker/securitycheck.class.php
According to the author usage of the eval() PHP function allows users to interpret a string as PHP code and variable execution is somewhat common, but also a trick often used to prevent easy detection of malicious code.
For now I'll uninstall Ultimate Security Checker and hopefully remember to re-install it from time to time to run a security check. Because it sure is a helpful plugin.