Making OS X Lion use search paths.

Apple changed the behavior of DNS search list processing in Lion (OS X Lion: About search domains and name lookups). 

This makes it differ from the behavior listed in RFC1536. If you need / prefer the RFC-compliant search path processing, add the -AlwaysAppendSearchDomains argument to the /usr/sbin/mDNSResponder process in /System/Library/LaunchDaemons/