We have a new Jenkins LTS version available:
1.609.2 has been released on 2015/07/28
1.609.3 has been released on 2015/09/02
Changelog http://jenkins-ci.org/changelog-stable
> **What's new in 1.609.3 (2015/09/02)**
>
> When NodeProvisioner processes planned nodes, it must always call spent() (issue 29568)
> Sort by 'Free Disk Space' is incorrect (issue 29286)
> Label expression help is missing in recent Jenkins versions (issue 29376)
> The curious case of the Channel memory cycles (issue 28844)
> Excessive classes being sent to slave machine (issue 28058)
>
> **What's new in 1.609.2 (2015/07/28)**
>
> NPE may happen if somebody tries to drop the e-mail JenkinsLocationConfiguration:setAdminAddress() (issue 28419)
> Build History badges don't wrap (issue 28455)
> Deadlock between Queue.maintain and Executor.interrupt (issue 28840)
> Jenkins queue self-locking without apparent reason? (issue 28926)
> Deadlock in hudson.model.Executor (issue 28690)
> UnlabeledLoad.computeQueueLength() includes labeled jobs (issue 28446)
> Job loading can be broken by a NPE in a build trigger (issue 27549)
> post-build action statuses handling (issue 26964)
We should upgrade WMF Jenkins.
Full changelog is http://jenkins-ci.org/changelog (We currently run Jenkins 1.680.1).