I think that this is a known problem of m2 - and I don't see a good solution for this. Using different versions of plugins in different modules makes sense as we have different release cycles (well at least that's the plan). So the only working solution right now seems to be to build module by module separately.
I was about to suggest using the parent pom to specify the plugin version, but I see this is already done... although the maven-bundle-plugin is commented out right now.
Any idea why? Herko
