I was trying to use Eclipse Helios and Eclipse Indigo and configure different colors for occurences in preferences but the marker doesn't show up in right hand gutter for occurences and errors as it should. By any chance do yo know how to rectify such annoying problem?
In .properties file I had to set the following natures:
<nature>org.eclipse.jem.workbench.JavaEMFNature</nature>
<nature>org.eclipse.jem.beaninfo.BeanInfoNature</nature>
to the following:
<natures>
<nature>org.eclipse.jdt.core.javanature</nature>
<nature>org.maven.ide.eclipse.maven2Nature</nature>
</natures>
That solves the problem!