A detailed description of the issue is here:
The short of it is that maven appears to be using the wrong <dependencyManagement> version in a transitive dependency. There are two relevant <dependencyManagement> sections in the build, one pulled in by guice and one pulled in by gwizard-parent. These are the dependency paths from the top:
gwizard-example -> gwizard-config -> gwizard-parent
gwizard-example -> gwizard-config -> guice -> guice-parent
gwizard-parent's dependencyManagement specifies guava 18
guice-parent's dependencyManagement specifies guava 16
Guava 16 is winning. This seems highly undesirable, and in fact it breaks our build. I would expect that in a version # fight, "closest to the top" should win.