After bumping up version of maven-assembly-plugin from 2.4 to 2.5, files within the assembly are now read-only

Question

I am hoping that someone may be able to explain this change in behaviour of the maven-assembly-plugin w.r.t. file permissions.

This was causing our Eclipse-based application to fail to launch as it was unable to obtain locks on files because of Locking is not possible in the directory C:\eclipse\configuration\org.eclipse.osgi

The original files I am bundling into the built assembly are not read only so I would not expect the files to suddenly become read-only in the zip file. I cannot find any information on changes that might have altered this behaviour; it seems like a regression to me but if it is intentional for whatever reason then users should have been informed about the change in behaviour in the announcement of the release of the 2.5 version of the plugin of in the changelog.

This might be related to the upgrade of the plexus-archiver transitive dependency rather than the upgrade of maven assembly itself.

BTW this is on Windows 7.

Edit: Simple example as requested:

POM configured with a maven-assembly-plugin configured thus,

        <plugin>
            <artifactId>maven-assembly-plugin</artifactId>
            <version>2.5</version>
            <executions>
                <execution>
                    <configuration>
                        <descriptors>
                            <descriptor>binary.xml</descriptor>
                        </descriptors>
                    </configuration>
                    <id>make-binary</id>
                    <phase>package</phase>
                    <goals>
                        <goal>single</goal>
                    </goals>
                </execution>
            </executions>
        </plugin>

referencing an assembly descriptor binary.xml that brings in some arbitrary files, in this case the pom.xml and the binary.xml of the build,

<assembly
    xmlns="http://maven.apache.org/plugins/maven-assembly-plugin/assembly/1.1.0"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://maven.apache.org/plugins/maven-assembly-plugin/assembly/1.1.0 http://maven.apache.org/xsd/assembly-1.1.0.xsd">

    <id>binary</id>
    <formats>
        <format>zip</format>
    </formats>

    <fileSets>
        <fileSet>
            <directory></directory>
            <outputDirectory></outputDirectory>
            <includes><include>**</include></includes>
        </fileSet>
    </fileSets>

</assembly>