Major Description
Ivy downloads artifacts that are not needed at all. The problem was found in a project that depends on hibernate 3.0.5 and another library that needed hibernate 2.1.8. The 2.1.8 depends on the 'odbg' module, but 3.0.5 don't; the 2.1.8 was evicted, but the odmg was downloaded.
I think ivy shouldn't dowload odmg because there isn't a module that depends on it.