Since the upgrade to Jenkins-1.424.3, we are unable to build a native maven build on maven2 projects.

Seems like it's trying to parse the project's pom, and it won't succeed.
Might be related to the bigger strictness of M3, but from a m2 project point of view, it's a regression :-/.

L'ééchéance d'une alarme périodique a provoqué le lancement de ce job
ln -s 2012-03-02_07-28-27 /ic/.jenkins/jobs/someproject-10.0/builds/517 failed: -1 
Building on master
Updating svn://somesvn/someproject-parent
At revision 69492
no change for svn://somesvn/someproject-parent since the previous build
No emails were triggered.
Parsing POMs
Failed to transfer Not authorized, ReasonPhrase:Unauthorized.
ERROR: Echec à la lecture des POMs
org.apache.maven.project.ProjectBuildingException: Some problems were encountered while processing the POMs:
[FATAL] Non-resolvable parent POM: Could not transfer artifact fr.gid:someartefact:pom:11.5.0 from/to devRepo (http://repository.corp.net:8081/nexus/content/groups/public/): Not authorized, ReasonPhrase:Unauthorized. and 'parent.relativePath' points at wrong local POM @ line 5, column 10

	at org.apache.maven.project.DefaultProjectBuilder.build(DefaultProjectBuilder.java:339)
	at hudson.maven.MavenEmbedder.buildProjects(MavenEmbedder.java:360)
	at hudson.maven.MavenEmbedder.readProjects(MavenEmbedder.java:330)
	at hudson.maven.MavenEmbedder.readProject(MavenEmbedder.java:321)
	at hudson.maven.MavenModuleSetBuild$PomParser.invoke(MavenModuleSetBuild.java:1355)
	at hudson.maven.MavenModuleSetBuild$PomParser.invoke(MavenModuleSetBuild.java:1182)
	at hudson.FilePath.act(FilePath.java:758)
	at hudson.FilePath.act(FilePath.java:740)
	at hudson.maven.MavenModuleSetBuild$RunnerImpl.parsePoms(MavenModuleSetBuild.java:869)
	at hudson.maven.MavenModuleSetBuild$RunnerImpl.doRun(MavenModuleSetBuild.java:634)
	at hudson.model.AbstractBuild$AbstractRunner.run(AbstractBuild.java:458)
	at hudson.model.Run.run(Run.java:1376)
	at hudson.maven.MavenModuleSetBuild.run(MavenModuleSetBuild.java:487)
	at hudson.model.ResourceController.execute(ResourceController.java:88)
	at hudson.model.Executor.run(Executor.java:175)
[WARNINGS] Skipping publisher since build result is FAILURE
Saut de l&#39analyse sonar suite à un mauvais status de construction FAILURE
Email was triggered for: Failure
Sending email for trigger: Failure
Sending email to: team@corp.fr
Notifying upstream projects of job completion
Finished: FAILURE

I didn't put that issue as BLOCKER since the solution is to recreate the job as freestyle one. But it's an awkward solution.

PS : yes, I know the feature is still said to be beta.

Cheers