===================================================================
RCS file: /cvs/RT/Invoicing/lib/RTI/State.pm,v
retrieving revision 1.1
retrieving revision 1.2
diff -u -r1.1 -r1.2
--- RT/Invoicing/lib/RTI/State.pm	2011/12/22 04:52:42	1.1
+++ RT/Invoicing/lib/RTI/State.pm	2011/12/30 05:01:56	1.2
@@ -119,7 +119,9 @@
     my ($self, $custid) = @_;
 
     $self->_match_payments;
-    return $self->{_table}->{unpaid}->{$custid};
+    return defined $custid
+        ? $self->{_table}->{unpaid}->{$custid}
+        : $self->{_table}->{unpaid};
 }
 
 sub save {