ZipGrep is a utility that can list and search zip (.war, .ear, .jar, etc) archives for text patterns, without the need to extract the archive's contents.
One of a set of tools we're offering as a way to say thank you for being a part of the community.
Are you using IE with In-Private Browsing enabled? That might be the reason.
http://answers.microsoft.com/en-us/ie/forum/ie9-windows_7/ie9-history-does-not-show-all-sites-visited-how-do/3fc3d809-ce7f-e011-9b4b-68b599b31bf5