NPE in Bitbucket repository

2011-05-24 18:44:14,647 INFO [1-UpgradeTaskBackgroundThread:pool-7-thread-1] [UpgradeTask2408RecalculateJobRequirementsForTasksUpgrade] Updated requirements for 'TAC-TEST-JOB1' Removed: '2' Added: '2'
2011-05-24 18:44:14,918 ERROR [1-UpgradeTaskBackgroundThread:pool-7-thread-1] [AbstractUpgradeManager] com.google.common.collect.ComputationException: java.lang.NullPointerException
com.google.common.collect.ComputationException: java.lang.NullPointerException
    at com.google.common.collect.ComputingConcurrentHashMap$ComputingSegment.compute(ComputingConcurrentHashMap.java:167)
    at com.google.common.collect.ComputingConcurrentHashMap$ComputingSegment.compute(ComputingConcurrentHashMap.java:116)
    at com.google.common.collect.ComputingConcurrentHashMap.apply(ComputingConcurrentHashMap.java:67)
    at com.google.common.collect.MapMaker$ComputingMapAdapter.get(MapMaker.java:623)
...
Caused by: java.lang.NullPointerException
    at com.atlassian.bamboo.plugins.hg.BitbucketRepository.populateFromConfig(BitbucketRepository.java:204)
    at com.atlassian.bamboo.fieldvalue.BuildDefinitionConverter.copyConfigurationToDefinition(BuildDefinitionConverter.java:175)
    at com.atlassian.bamboo.build.DefaultBuildDefinitionManager.getBuildDefinition(DefaultBuildDefinitionManager.java:66)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
    at java.lang.reflect.Method.invoke(Method.java:597)
    at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:304)
    at org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:182)
    at org.spr