diff -Naur -x '*.rej' -x '*~' -x '*.orig' bash-completion-1.99/bash_completion bash-completion-1.99-disable-user-completion/bash_completion
--- bash-completion-1.99/bash_completion	2012-01-08 00:03:46.000000000 +0100
+++ bash-completion-1.99-disable-user-completion/bash_completion	2012-01-09 11:46:46.562818788 +0100
@@ -1954,9 +1954,6 @@
 fi
 unset i _blacklist_glob
 
-# source user completion file
-[[ ${BASH_SOURCE[0]} != ~/.bash_completion && -r ~/.bash_completion ]] \
-    && . ~/.bash_completion
 unset -f have
 unset have