After running "clean" phase, eclipse detects some errors due to missing folder.

We are using the configuration point out at the bottom of the page : http://maven.apache.org/plugins/maven-eclipse-plugin/examples/multi-module-projects.html

The presence of the <wtpmanifest>true</wtpmanifest> creates the folder "target\generated-resources\eclipse\META-INF\" (due to the creation of the file target\generated-resources\eclipse\META-INF\MANIFEST.MF) during the "eclipse:eclipse" goal.

First trouble, when we run the phase "clean" this folder is deleted and never recreated, even if we run other phases (like install). When Eclipse refresh its folder tree it indicates an error due to this sources missing folder.

Another trouble, is that the name of this Manifest file is hardcoded in the class EclipseManifestWriter
See http://svn.apache.org/viewvc/maven/plugins/trunk/maven-eclipse-plugin/src/main/java/org/apache/maven/plugin/eclipse/writers/EclipseManifestWriter.java?revision=618468&view=markup
The plugin manifest is not used, neither the plugin configuration:
<manifest>
${basedir}/src/main/resources/META-INF/MANIFEST.MF
</manifest>