I was playing with the Clover Maven plugin for the first time and came across this bug:

[INFO] Internal error in the plugin manager executing goal 'org.apache.maven.plugins:maven-clover-plugin:2.4.1:instrumentInternal': Unable to find the mojo 'org.apache.maven.plugins:maven-clover-plugin:2.4.1:instrumentInternal' in the plugin 'org.apache.maven.plugins:maven-clover-plugin'

https://support.atlassian.com/browse/CLV-4630
https://support.atlassian.com/browse/CLV-4696

Effectively maven was ignoring my ~/.mv2/settings.xml and locating the old clover plugin on maven central. The release notes for 2.0.5 fixed the following bug (not sure if it's the bug that was fixed however upgrading from 2.0.4 to 2.0.8 fixed the problem for me):

[MNG-2236] - DefaultMavenProjectBuilder.buildStandaloneSuperProject() should include a ProfileManager that includes active profiles from settings.xml

We should work out if <2.0.5 is causing problems for us and document the minumum version of maven required if so.

Assigning to you, Tom, to investigate and re-assign to Ed once you've clarified what's going on.