Index: /trunk/lib/MT/App/CMS.pm
===================================================================
--- /trunk/lib/MT/App/CMS.pm (revision 404)
+++ /trunk/lib/MT/App/CMS.pm (revision 436)
@@ -1733,4 +1733,5 @@
     my $file = '';
     $file = dirify($blog->name) . '-' if $blog;
+    $file = "Blog-" . $blog->id . '-' if $file eq '-';
     my @ts = gmtime(time);
     my $ts = sprintf "%04d-%02d-%02d-%02d-%02d-%02d",