Crash on list attachments page

viewing attachments for TEST space on confluence.atlassian.com:

[ERROR] Fri Apr 22 02:09:41 CDT 2005 [com.atlassian.confluence.util.XWorkTransactionInterceptor] Invoking rollback for transaction on action '/spaces/listattachmentsforspace.action (ListAttachmentsAction.execute())' due to throwable: java.lang.NullPointerException
Throwable:
java.lang.NullPointerException
at com.atlassian.confluence.util.AttachmentNameComparator.compare(AttachmentNameComparator.java:12)
at java.util.Arrays.mergeSort(Arrays.java:1278)
at java.util.Arrays.mergeSort(Arrays.java:1289)
at java.util.Arrays.mergeSort(Arrays.java:1289)
at java.util.Arrays.mergeSort(Arrays.java:1290)
at java.util.Arrays.mergeSort(Arrays.java:1289)
at java.util.Arrays.mergeSort(Arrays.java:1289)
at java.util.Arrays.mergeSort(Arrays.java:1290)
at java.util.Arrays.sort(Arrays.java:1219)
at java.util.Collections.sort(Collections.java:155)
at com.atlassian.confluence.spaces.actions.ListAttachmentsAction.getAttachments(ListAttachmentsAction.java:54)
at com.atlassian.confluence.spaces.actions.ListAttachmentsAction.getItems(ListAttachmentsAction.java:30)
at com.atlassian.confluence.pages.actions.AbstractPaginatedListAction.execute(AbstractPaginatedListAction.java:20)
at com.opensymphony.xwork.DefaultActionInvocation.invoke(DefaultActionInvocation.java:168)
at com.opensymphony.xwork.interceptor.AroundInterceptor.intercept(AroundInterceptor.java:35)
at com.opensymphony.xwork.DefaultActionInvocation.invoke(DefaultActionInvocation.java:165)
at com.opensymphony.xwork.interceptor.DefaultWorkflowInterceptor.intercept(DefaultWorkflowInterceptor.java:55)
at com.atlassian.confluence.core.ConfluenceWorkflowInterceptor.intercept(ConfluenceWorkflowInterceptor.java:33)
at com.opensymphony.xwork.DefaultActionInvocation.invoke(DefaultActionInvocation.java:165)