Unable to build EntityManagerFactory: Migrando do hibernate 3.4.0.GA para 4.1.9.Final

Colegas,

Preciso migrar do hibernate 3.4.0.GA para 4.1.9.Final em uma aplicação que usa jsf2, spring e hibernate.
Mas ao mudar o hibernate para a versão para 4.1.9.Final (Na versão 3.4.0.GA funciona legal) apresenta o erro:
Unable to build EntityManagerFactory

Onde estou errando?

Muito obrigado,
Marques

Abaixo os arquivos aplicationContext.xml e pom.xml.

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
	xmlns:context="http://www.springframework.org/schema/context"
	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
	xmlns:aop="http://www.springframework.org/schema/aop"
	xmlns:faces="http://www.springframework.org/schema/faces"
	xmlns:int-security="http://www.springframework.org/schema/integration/security"
	xmlns:tx="http://www.springframework.org/schema/tx" 
	xmlns:sec="http://www.springframework.org/schema/security"
	xsi:schemaLocation="http://www.springframework.org/schema/integration/security 
		http://www.springframework.org/schema/integration/security/spring-integration-security-3.1.xsd
		http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-3.1.xsd
		http://www.springframework.org/schema/security http://www.springframework.org/schema/security/spring-security-3.1.xsd
		http://www.springframework.org/schema/integration http://www.springframework.org/schema/integration/spring-integration.xsd
		http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.1.xsd
		http://www.springframework.org/schema/faces http://www.springframework.org/schema/faces/spring-faces-3.1.xsd
		http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.1.xsd
		http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd">

	<!-- resource security -->
	<!-- Note: Access-denied-page is invoked when user is AUTHENTICATED but 
		is not AUTHORIZED to access protected resources. When user is NOT AUTHENTICATED, 
		he is moved into form-login instead of access-denied-page. -->
	<sec:http auto-config="true">
		<sec:form-login login-page="/pages/public/login.jsf"
			authentication-failure-url="/pages/public/login.jsf?error=true" />
		<sec:logout logout-success-url="/pages/public/login.jsf" />
		<sec:intercept-url pattern="/index.jsf" access="ROLE_USER" />
		<sec:intercept-url pattern="/pages/app/**" access="ROLE_USER" />
		<sec:intercept-url pattern="/pages/admin/**" access="ROLE_USER" />
	</sec:http>

	<!-- business logic (method) security -->
	<sec:global-method-security
		secured-annotations="enabled" jsr250-annotations="enabled">
	</sec:global-method-security>

	<sec:authentication-manager alias="authenticationManager">
		<sec:authentication-provider>
			<sec:password-encoder hash="sha" />
			<sec:jdbc-user-service data-source-ref="dataSource"
				users-by-username-query="SELECT username, password, enable FROM user WHERE username = ?"
				authorities-by-username-query="SELECT username, authority FROM user u INNER JOIN user_role r on u.id = r.idUser where username = ?" />
		</sec:authentication-provider>
	</sec:authentication-manager>

	<!-- Seta anotaçoes para serem usadas pelo Spring -->
	<context:annotation-config />

	<!-- Define o pacote onde o Spring vai procurar por beans anotados -->
	<context:component-scan base-package="br.com.fit.jpisnet" />

	<!-- define que as transaçoes irao ser anotadas -->
	<tx:annotation-driven />

	<!-- Configuracao do Banco de Dados -->
	<bean id="dataSource"
		class="com.mchange.v2.c3p0.ComboPooledDataSource" destroy-method="close">
		<property name="driverClass" value="com.mysql.jdbc.Driver" />
		<property name="jdbcUrl" value="jdbc:mysql://localhost:3306/jpisnet" />
    		<property name="user" value="root" />
		<property name="password" value="secreta" />
		<property name="initialPoolSize" value="3" />
		<property name="minPoolSize" value="6" />
		<property name="maxPoolSize" value="20" />
		<property name="acquireIncrement" value="3" />
	</bean>

	<!-- Configuracao do Hibernate -->
	<bean id="entityManagerFactory"
		class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean">
		<property name="persistenceUnitName" value="jpisnetPU" />
		<property name="dataSource" ref="dataSource" />
		<property name="jpaVendorAdapter">
			<bean class="org.springframework.orm.jpa.vendor.HibernateJpaVendorAdapter">
				<property name="databasePlatform" value="org.hibernate.dialect.MySQLDialect" />
				<property name="showSql" value="true" />
			</bean>
		</property>
	</bean>
	
	<!-- Configuracao do gerente de transacoes do Spring -->
	<bean id="transactionManager" class="org.springframework.orm.jpa.JpaTransactionManager">
		<property name="entityManagerFactory" ref="entityManagerFactory" />
	</bean>
	
	 <!-- View scope -->
    <bean class="org.springframework.beans.factory.config.CustomScopeConfigurer">
        <property name="scopes">
            <map>
                <entry key="view">
                    <bean class="br.com.fit.jpisnet.resources.ViewScope"/>
                </entry>
            </map>
        </property>
    </bean>	
</beans>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
	<modelVersion>4.0.0</modelVersion>
	<groupId>br.com.fit</groupId>
	<artifactId>jpisnet</artifactId>
	<packaging>war</packaging>
	<version>1.0-SNAPSHOT</version>
	<name>JPisNet</name>
	<url>http://maven.apache.org</url>
	
	<properties>
		<spring.version>3.1.1.RELEASE</spring.version>
		<hibernate.version>4.1.6.Final</hibernate.version>
	</properties>
	
	<repositories>
		<repository>
			<id>prime-repo</id>
			<name>PrimeFaces Maven Repository</name>
			<url>http://repository.primefaces.org</url>
			<layout>default</layout>
		</repository>
	</repositories>

	<dependencies>
		<dependency>
			<groupId>com.sun.faces</groupId>
			<artifactId>jsf-api</artifactId>
			<version>2.1.6</version>
		</dependency>
		<dependency>
			<groupId>com.sun.faces</groupId>
			<artifactId>jsf-impl</artifactId>
			<version>2.1.6</version>
		</dependency>

		<dependency>
			<groupId>org.primefaces</groupId>
			<artifactId>primefaces</artifactId>
			<version>3.5</version>
		</dependency>
		<dependency>
			<groupId>org.primefaces.extensions</groupId>
			<artifactId>primefaces-extensions</artifactId>
			<version>0.6.2</version>
		</dependency>

		<dependency>
			<groupId>org.primefaces.themes</groupId>
			<artifactId>cupertino</artifactId>
			<version>1.0.6</version>
		</dependency>
		<dependency>
			<groupId>org.primefaces.themes</groupId>
			<artifactId>home</artifactId>
			<version>1.0.6</version>
		</dependency>

		<dependency>
			<groupId>javax.servlet</groupId>
			<artifactId>jstl</artifactId>
			<version>1.2</version>
		</dependency>

		<dependency>
			<groupId>javax.persistence</groupId>
			<artifactId>persistence-api</artifactId>
			<version>1.0</version>
		</dependency>

		<!-- Spring -->
		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-core</artifactId>
			<version>${spring.version}</version>
		</dependency>
		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-expression</artifactId>
			<version>${spring.version}</version>
		</dependency>
		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-beans</artifactId>
			<version>${spring.version}</version>
		</dependency>
		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-aop</artifactId>
			<version>${spring.version}</version>
		</dependency>
		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-context</artifactId>
			<version>${spring.version}</version>
		</dependency>
		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-context-support</artifactId>
			<version>${spring.version}</version>
		</dependency>
		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-tx</artifactId>
			<version>${spring.version}</version>
		</dependency>
		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-jdbc</artifactId>
			<version>${spring.version}</version>
		</dependency>
		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-orm</artifactId>
			<version>${spring.version}</version>
		</dependency>
		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-web</artifactId>
			<version>${spring.version}</version>
		</dependency>
		

		<!-- Spring Security -->  
		<dependency>
			<groupId>org.springframework.security</groupId>
			<artifactId>spring-security-core</artifactId>
			<version>${spring.version}</version>
		</dependency>
		<dependency>
			<groupId>org.springframework.security</groupId>
			<artifactId>spring-security-web</artifactId>
			<version>${spring.version}</version>
		</dependency>
		<dependency>
			<groupId>org.springframework.security</groupId>
			<artifactId>spring-security-config</artifactId>
			<version>${spring.version}</version>
		</dependency>
	  
		<dependency>
			<groupId>org.hibernate</groupId>
			<artifactId>hibernate-entitymanager</artifactId>
			<version>${hibernate.version}</version>
		</dependency>
		
		<dependency>
			<groupId>c3p0</groupId>
			<artifactId>c3p0</artifactId>
			<version>0.9.1.2</version>
		</dependency> 
		
		<dependency>
			<groupId>mysql</groupId>
			<artifactId>mysql-connector-java</artifactId>
			<version>5.1.15</version>
		</dependency>
		
		<dependency>
			<groupId>cglib</groupId>
			<artifactId>cglib-nodep</artifactId>
			<version>2.2.2</version>
		</dependency>
		
		<dependency>
			<groupId>org.slf4j</groupId>
			<artifactId>slf4j-api</artifactId>
			<version>1.6.1</version>
		</dependency>
		
		<dependency>
			<groupId>org.slf4j</groupId>
			<artifactId>slf4j-simple</artifactId>
			<version>1.6.1</version>
		</dependency>
		
		<dependency>
			<groupId>asm</groupId>
			<artifactId>asm-commons</artifactId>
			<version>3.1</version>
		</dependency>

		<dependency>
			<groupId>javax.el</groupId>
			<artifactId>el-api</artifactId>
			<version>2.2</version>
			<scope>provided</scope>
		</dependency>
	</dependencies>
	<build>
		<finalName>jpisnet</finalName>
		<plugins>
			<plugin>
				<groupId>org.apache.maven.plugins</groupId>
				<artifactId>maven-pmd-plugin</artifactId>
				<version>2.5</version>
				<configuration>
					<targetJdk>1.6</targetJdk>
				</configuration>
			</plugin>
		</plugins>
	</build>
</project>

Qual o erro completo?

Eu te aconselharia de ao invés de mudar a biblioteca, você criar um projeto para o hibernate 4 do zero.

Teve muita alteração da versão 3.x para 4.

Ninguém?