Index: /branches/release-33/plugins/spamlookup/lib/spamlookup.pm
===================================================================
--- /branches/release-33/plugins/spamlookup/lib/spamlookup.pm (revision 1174)
+++ /branches/release-33/plugins/spamlookup/lib/spamlookup.pm (revision 1721)
@@ -139,5 +139,5 @@
                 my @textdomains = extract_domains($obj->text);
                 if (!@textdomains) {
-                    my $url = $obj->url;
+                    my $url = $obj->url || '';
                     $url =~ s/^\s+|\s+$//gs;
                     if ($url =~ m!https?://\w+!) { # valid url requirement...
@@ -163,5 +163,5 @@
                 }
             } elsif (UNIVERSAL::isa($obj, 'MT::TBPing')) {
-                my $url = $obj->source_url;
+                my $url = $obj->source_url || '';
                 $url =~ s/^\s+|\s+$//gs;
                 my $terms = { source_url => $url,