The file portal-impl\src\com\liferay\portal\service\persistence\UserFinderImpl.java has an error in the implementation of the method:

public int countByC_FN_MN_LN_SN_EA_S(
long companyId, String firstName, String middleName,
String lastName, String screenName, String emailAddress,
int status, LinkedHashMap<String, Object> params,
boolean andOperator)
throws SystemException

The error is that on line 197:

String[] screenNames = CustomSQLUtil.keywords(lastName);

The value for screenNames is incorrectly taken from the input parameter lastName; it should be taken from the input parameter screenName.

This causes calling code to typically be returned incorrect results from this method.

(Note: the other variant of countByC_FN_MN_LN_SN_EA_S that takes array parameters does not suffer from this problem).