antrun plugin not honoring overwrite="false" (explicit or by default)

[Jared Blitzstein]

Anyone else have a problem with antrun ignoring overwrite="false"? I  
have the following in my pom

                        <plugin>
                                <artifactId>maven-antrun-plugin</artifactId>
                                <executions>
                                        <execution>
                                                <phase>compile</phase>
                                                <goals>
                                                        <goal>run</goal>
                                                </goals>
                                                <configuration>
                                                        <tasks>
                                                                <copy
                                                                        
todir="${basedir}/target/${artifactId}/WEB-INF/config/">
                                                                        <fileset
                                                                                
dir="${basedir}/target/classes/config/">
                                                                                <include 
name="*.*" />
                                                                        
</fileset>
                                                                </copy>
                                                                <copy 
overwrite="false"
                                                                        
todir="${basedir}/src/main/webapp/WEB-INF/config/">
                                                                        <fileset
                                                                                
dir="${basedir}/target/classes/config/">
                                                                                <include 
name="*.*" />
                                                                        
</fileset>
                                                                </copy>
                                                        </tasks>
                                                </configuration>
                                        </execution>
                                </executions>
                        </plugin>

The second copy shouldn't override files if they already exist in  
that directory, but it is. Anyone see anything incorrect with this code?