Index: /branches/release-30/lib/MT/WeblogPublisher.pm
===================================================================
--- /branches/release-30/lib/MT/WeblogPublisher.pm (revision 1403)
+++ /branches/release-30/lib/MT/WeblogPublisher.pm (revision 1404)
@@ -4518,4 +4518,5 @@
         $end   = $ctx->{current_timestamp_end};
     }
+    return [] unless $blog && $cat;
     my @entries = MT::Entry->load(
         {