Im my pom.xml there is a section re. generated resources (these are generated using the hibernate3-maven-plugin / v2.2).
        <plugin>
            <groupId>org.codehaus.mojo</groupId>
            <artifactId>build-helper-maven-plugin</artifactId>
            <version>1.7</version>
            <executions>
                <execution>
                    <id>add-source</id>
                    <phase>generate-sources</phase>
                    <goals>
                        <goal>add-source</goal>
                        <goal>add-test-source</goal>
                    </goals>
                    <configuration>
                        <sources>
                            <source>target/generated-sources</source>
                            <source>src/main/java</source>
                        </sources>
                    </configuration>
                </execution>
            </executions>
        </plugin>
In my understanding this should add "target/generated-sources" to the compilation source path, so that these files are also compiled and the generated class files end up in .../target/classes.
Now, after importing that project into Eclipse I find the below in the .classpath file:
<classpathentry kind="src" output="target/test-classes" path="target/generated-sources">
    <attributes>
        <attribute name="optional" value="true"/>
        <attribute name="maven.pomderived" value="true"/>
        <attribute name="test" value="true"/>
    </attributes>
</classpathentry>
Why does M2E consider these generated-sources as test-classes, i.e. puts them into the target/test-classes folder and marks that path with 'attribute name="test" value="true"' ??? Of course the compilation of dependent projects then invariably fails because imports of these generated classes can not be satisfied. :-( 
If I manually mangle the .classpath file and change the output path to 'output="target/classes"' and remove the test-attribute, then things work fine. But shortly after Eclipse will mark my project faulty because it is out-of-sync with regards to the pom.xml and requires me to do a Maven -> Update project. But this changes things back to faulty and the compilation fails again. :-(( 
Is there anything wrong with the pom or is that a bug in M2E or how can I correct that situation?