git fails to record scm polling

I get the following error when using the latest git plugin.
This prevents any build from starting

Started on Sep 23, 2010 9:03:14 AM
Using strategy: Default
[poll] Last Build : #539
[poll] Last Built Revision: Revision 1202a30ee369bd0ee69c006a20e4cc4d1e91e8ba (origin/master)
ERROR: Failed to record SCM polling
[8mha:AAAAWB+LCAAAAAAAAABb85aBtbiIQSmjNKU4P08vOT+vOD8nVc8DzHWtSE4tKMnMz/PLL0ldFVf2c+b/lb5MDAwVRQxSaBqcITRIIQMEMIIUFgAAckCEiWAAAAA=[0mjava.lang.NullPointerException
at hudson.model.Run.getEnvironment(Run.java:1673)
at hudson.model.AbstractBuild.getEnvironment(AbstractBuild.java:682)
at hudson.plugins.git.GitSCM.pollChanges(GitSCM.java:420)
at hudson.scm.SCM.poll(SCM.java:369)
at hudson.model.AbstractProject.poll(AbstractProject.java:1195)
at hudson.triggers.SCMTrigger$Runner.runPolling(SCMTrigger.java:355)
at hudson.triggers.SCMTrigger$Runner.run(SCMTrigger.java:384)
at hudson.util.SequentialExecutionQueue$QueueEntry.run(SequentialExecutionQueue.java:118)
at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source)
at java.util.concurrent.FutureTask$Sync.innerRun(Unknown Source)
at java.util.concurrent.FutureTask.run(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)