The xargs issue is AFAIU unrelated to the svn one and fixed in bash-completion 2.1, specifically by this commit:
http://anonscm.debian.org/gitweb/?p=bash-completion/bash-completion.git;a=commitdiff;h=2472fad -- To UNSUBSCRIBE, email to [email protected] with a subject of "unsubscribe". Trouble? Contact [email protected]
