That's too: thanks. However, it seems that using 2.4.3 version still has the same issue as before (perhaps, because of the POM file on that version referring to the codehaus repo). Upgrading to 2.4.4 solve that, but then org.codehaus.groovy:groovy-eclipse-batch:jar:2.4.4-01 can not be resolved.
Let me ask this on groovy dev@ list to see if there's a fix for this situation. In the meantime - a bit better version of the patch.