Index: BOOK/materials/common/packages.xml
===================================================================
--- BOOK/materials/common/packages.xml (revision e7a48462b8444da273bde2242f00158dfb1dc649)
+++ BOOK/materials/common/packages.xml (revision 7b0c0669e08fec97d2ea83c3c4c507feef12e59a)
@@ -570,4 +570,13 @@
Download:
MD5 sum: &zlib-md5;
+
+
+ Zlib (&zlib-version;) may no longer be available at the
+ listed location. The site administrators of the master download
+ location occasionally remove older versions when new ones are
+ released. An alternative download location that may have the
+ correct version available is .
+