Unable to resolve issues when GreenHopper's "Release Version History" custom field is configured to display on the "Resolve Issue" screen

Steps to reproduce:

• Add the "Resolve Issue" screen to the "Release Version History" custom field.
• Attempt to resolve an issue.

Expected result:

• Issue is marked as resolved.

Actual result:

• An error box will be displayed with no text in it.
• The issue status will not change.
• The follow stack trace will result in the logs:

  2012-04-10 16:46:06,064 TP-Processor10 ERROR sysadmin 1006x13792x1 c6jbgu 70.35.42.138,207.223.247.34 /secure/CommentAssignIssue.jspa [atlassian.jira.workflow.OSWorkflowManager] Caught exception while attempting to perform action 5 from workflow 10733 on issue 'MYPROJ-100'
  java.lang.NullPointerException
  at java.util.AbstractCollection.addAll(AbstractCollection.java:303)
  at com.pyxis.greenhopper.jira.customfields.ReleasedVersionHistoryCFType.updateValue(ReleasedVersionHistoryCFType.java:68)
  at com.pyxis.greenhopper.jira.customfields.ReleasedVersionHistoryCFType.updateValue(ReleasedVersionHistoryCFType.java:25)
  at com.atlassian.jira.issue.fields.CustomFieldImpl.updateValue(CustomFieldImpl.java:411)
  at com.atlassian.jira.issue.fields.CustomFieldImpl.updateValue(CustomFieldImpl.java:372)
  at com.atlassian.jira.workflow.function.issue.GenerateChangeHistoryFunction.execute(GenerateChangeHistoryFunction.java:63)
  at com.opensymphony.workflow.AbstractWorkflow.executeFunction(AbstractWorkflow.java:869)
  at com.opensymphony.workflow.AbstractWorkflow.transitionWorkflow(AbstractWorkflow.java:1265)
  

Either it should not be possible to add screens to the "Release Version History" custom field or an informative error message should be displayed (or both).