--- a/update.sh
+++ b/update.sh
@@ -37,6 +37,7 @@
 
 # Copy over the "addendum" content, if the filesystem allows it use
 # hardlinks to avoid wasting space.
+find addendum \( -name '*~' -o -name '*.orig' \) -delete
 cp -lrf addendum/.[^#.]* addendum/* output/
 
 # Start the XSLT process and create the pages. Please note that the