diff --git a/doc/html/comparison.html b/doc/html/comparison.html
index c48e3918..0c57bb35 100644
--- a/doc/html/comparison.html
+++ b/doc/html/comparison.html
@@ -105,7 +105,7 @@
 			Apple Lossless - A new proprietary codec by Apple.  Not much is known about it.
 		</LI>
 		<LI>
-			<A HREF="http://yoyo.cc.monash.edu.au/~pfh/bonk/">Bonk</A> - An open-source source codec.  No player or library support yet.
+			<A HREF="http://www.logarithmic.net/pfh/bonk">Bonk</A> - An open-source source codec.  No player or library support yet.
 		</LI>
 		<LI>
 			<A HREF="http://sourceforge.net/projects/kexis">Kexis</A> - An open-source source codec. Development seems to have stopped at the alpha stage.  No player or library support yet.
@@ -123,13 +123,13 @@
 			Ogg Squish - An open source source codec that is no longer maintained.  The version I tested, 0.98, was the latest I could find.  I don't have Windows timing results but it is among the 'fast' coders, based on UNIX tests.
 		</LI>
 		<LI>
-			<A HREF="http://ghido.shelter.ro/">optimFROG</A> - A closed source, Windows/Linux codec, with Winamp and XMMS plugins.  Slow but high compression ratios.
+			<A HREF="http://losslessaudiocompression.com/">optimFROG</A> - A closed source, Windows/Linux codec, with Winamp and XMMS plugins.  Slow but high compression ratios.
 		</LI>
 		<LI>
 			<A HREF="http://www.jpg.com/products/sound.html">Pegasus-SPS</A> - A closed source, Windows-only codec.
 		</LI>
 		<LI>
-			<A HREF="http://rksoft.virtualave.net/">RKAU</A> - A closed source, Windows-only codec.  No update in over two years.
+			<A HREF="http://www.msoftware.co.nz/">RKAU</A> - A closed source, Windows-only codec.  No update in over two years.
 		</LI>
 		<LI>
 			<A HREF="http://www.softsound.com/Shorten.html">Shorten</A> - A.J. Robinson's well-known codec; source is available <A HREF="http://rpmfind.net/linux/rpm2html/search.php?query=shorten">here</A>.