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).