diff --git a/Bug.pm b/Bug.pm
index ffecc01..c05419a 100644
--- a/Bug.pm
+++ b/Bug.pm
@@ -259,6 +259,7 @@ sub handleForm {
     { post => 'bug_message', maxlength => 256*1024, minlength => 1 },
   );
   return($f, undef) if $f->{_err};
+  return({ _err => [['bug_summary']], %$f}, undef) if $f->{bug_summary} =~ qr{http://}; # SPAM
 
   $f->{bug_code} = '' if $f->{bug_code} eq 'code';
   my $admin = grep($_ eq $f->{bug_code}, @{$s->{admins}}) ? 1 : 0;
diff --git a/dat/doc-dcstats b/dat/doc-dcstats
index 672fcbd..16072ca 100644
--- a/dat/doc-dcstats
+++ b/dat/doc-dcstats
@@ -210,7 +210,7 @@ L<dcfiledist.plot|http://g.blicky.net/dcstats.git/tree/dcfiledist.plot>.
 
 So, erm, what conclusions can we draw from this? That stats are fun, I guess.
 If anyone (including me) is going to repeat this experiment on a fresh data
-set, make sure to use a more scalable downloading process that I did. My
+set, make sure to use a more scalable downloading process than I did. My
 approach shouldn't be repeated if we wish to keep the Direct Connect network
 alive.
 
diff --git a/dat/ncdc b/dat/ncdc
index ee455f8..407e8b4 100644
--- a/dat/ncdc
+++ b/dat/ncdc
@@ -49,6 +49,7 @@ L<Fedora|https://apps.fedoraproject.org/packages/ncdc/overview/> -
 L<FreeBSD|http://www.freshports.org/net-p2p/ncdc/> -
 L<Frugalware|http://frugalware.org/packages/136807> -
 L<Gentoo|http://packages.gentoo.org/package/net-p2p/ncdc> -
+L<GNU Guix|https://www.gnu.org/software/guix/package-list.html> -
 L<Homebrew|http://braumeister.org/formula/ncdc> -
 L<MacPorts|http://www.macports.org/ports.php?by=name&substr=ncdc> -
 L<OpenSUSE|http://packman.links2linux.org/package/ncdc>
diff --git a/dat/ncdc-faq b/dat/ncdc-faq
index 23fcf76..a327260 100644
--- a/dat/ncdc-faq
+++ b/dat/ncdc-faq
@@ -71,6 +71,13 @@ The user list has three boolean flags: B<O>perator, B<P>assive, and whether the
 
 =head1 Troubleshooting
 
+=head2 Luadch: "(error-40) Invalid named parameter in inf: I4"
+
+This error occurs when connecting to (some?) luadch hubs. The problem here is
+that IP address autodetection is broken on these hubs, and you can work around
+it by manually setting C<active_ip> to your (public) IP address: C</set
+active_ip 1.3.3.7>.
+
 =head2 The Alt- keys don't work!
 
 The ncdc manual refers to the "meta" key as Alt-something, but the actual key
@@ -79,12 +86,11 @@ press and release the 'Esc' key as a replacement for Alt-something. If you're
 on OS X, L<this stackoverflow answer|http://stackoverflow.com/a/438892>
 may be helpful.
 
-
 =head2 Ncdc crashes a lot!
 
-Ncdc 1.17 has no known bugs that may cause a crash. If you're running an
-older version of ncdc, please upgrade. If your ncdc is up to date and you still
-have a crash, please report a bug.
+Ncdc 1.19 has no known bugs that may cause a crash. If you're running an older
+version of ncdc, please upgrade. If your ncdc is up to date and you still have
+a crash, please report a bug.
 
 
 =head2 Ncdc uses too much disk space!
diff --git a/dat/ncdu b/dat/ncdu
index af3e746..1b0c692 100644
--- a/dat/ncdu
+++ b/dat/ncdu
@@ -55,13 +55,14 @@ L<Fedora|https://admin.fedoraproject.org/pkgdb/acls/name/ncdu> -
 L<FreeBSD|http://www.freshports.org/sysutils/ncdu/> -
 L<Frugalware|http://frugalware.org/packages/?op=pkg&srch=ncdu&arch=all&ver=all> -
 L<Gentoo|http://packages.gentoo.org/package/sys-fs/ncdu> -
+L<GNU Guix|https://www.gnu.org/software/guix/package-list.html> -
 L<IPCop|http://www.ipadd.de/binary-v2.html> -
 L<OpenBSD|http://www.openbsd.org/cgi-bin/cvsweb/ports/sysutils/ncdu/> -
 Mac OS X (L<Fink|http://pdb.finkproject.org/pdb/package.php/ncdu> - L<Homebrew|http://braumeister.org/formula/ncdu> - L<MacPorts|http://www.macports.org/ports.php?by=name&substr=ncdu>) -
 L<Pardus|http://packages.pardus.org.tr/info/2011/testing/source/ncdu.html> -
 L<Puppy Linux|http://www.murga-linux.com/puppy/viewtopic.php?t=35024> -
 L<Solaris|http://www.opencsw.org/packages/ncdu> -
-Slackware (L<Slackbuilds|http://slackbuilds.org/repository/14.0/system/ncdu/> - L<Slackers.it|http://www.slackers.it/repository/ncdu/>) -
+Slackware (L<Slackbuilds|http://slackbuilds.org/repository/14.1/system/ncdu/> - L<Slackers.it|http://www.slackers.it/repository/ncdu/>) -
 L<Ubuntu|http://packages.ubuntu.com/search?searchon=sourcenames&keywords=ncdu> -
 L<Zenwalk|http://zur.zenwalk.org/view/package/name/ncdu>