All of my jobs that use ArtifactDeployer have started failing with the following error since June 18 (which is probably when I updated all the plugin versions before leaving for a nice vacation):

Archiving artifacts
[ArtifactDeployer] - Starting deployment from the post-action ...
ERROR: Step ‘[ArtifactDeployer] - Deploy the artifacts from build workspace to remote locations’ aborted due to exception:
java.lang.NoClassDefFoundError: Could not initialize class org.jruby.ext.posix.Linux64HeapFileStat
at org.jruby.ext.posix.LinuxPOSIX.allocateStat(LinuxPOSIX.java:44)
at org.jruby.ext.posix.LinuxPOSIX.stat(LinuxPOSIX.java:87)
at com.atlassian.ant.tasks.PermissionsUtils.getPermissions(PermissionsUtils.java:21)
at com.atlassian.ant.tasks.CopyWithPerms.doFileOperations(CopyWithPerms.java:75)
at org.jenkinsci.plugins.artifactdeployer.service.LocalCopy$1CopyImpl.doFileOperations(LocalCopy.java:60)
at org.apache.tools.ant.taskdefs.Copy.execute(Copy.java:568)
at org.jenkinsci.plugins.artifactdeployer.service.LocalCopy.copyAndGetNumbers(LocalCopy.java:83)
at org.jenkinsci.plugins.artifactdeployer.service.ArtifactDeployerCopy.invoke(ArtifactDeployerCopy.java:71)
at org.jenkinsci.plugins.artifactdeployer.service.ArtifactDeployerCopy.invoke(ArtifactDeployerCopy.java:41)
at hudson.FilePath.act(FilePath.java:1078)
at hudson.FilePath.act(FilePath.java:1061)
at org.jenkinsci.plugins.artifactdeployer.ArtifactDeployerPublisher.processDeployment(ArtifactDeployerPublisher.java:204)
at org.jenkinsci.plugins.artifactdeployer.ArtifactDeployerPublisher._perform(ArtifactDeployerPublisher.java:130)
at org.jenkinsci.plugins.artifactdeployer.ArtifactDeployerPublisher.perform(ArtifactDeployerPublisher.java:99)
at hudson.tasks.BuildStepMonitor$1.perform(BuildStepMonitor.java:20)
at hudson.model.AbstractBuild$AbstractBuildExecution.perform(AbstractBuild.java:741)
at hudson.model.AbstractBuild$AbstractBuildExecution.performAllBuildSteps(AbstractBuild.java:690)
at hudson.model.Build$BuildExecution.post2(Build.java:186)
at hudson.model.AbstractBuild$AbstractBuildExecution.post(AbstractBuild.java:635)
at hudson.model.Run.execute(Run.java:1843)
at hudson.model.FreeStyleBuild.run(FreeStyleBuild.java:43)
at hudson.model.ResourceController.execute(ResourceController.java:97)
at hudson.model.Executor.run(Executor.java:429)