The bottom lines look like someone is doing a directory traversal scan. (
http://nmap.org/nsedoc/scripts/http-passwd.html)
The 64.14.3.218 actually belongs to McAfee - have you contracted with them to do vulnerability scans?
The empty get requests look like they may be coming from MSN DDOS attack - see
http://thehackerlounge.blogspot.com/2009/08/msn-ddos-attack-starter-edition.htmlGood Luck!