lucy24 - 11:04 pm on Apr 2, 2013 (gmt 0)
Most extensions do not use parameters, so any query string after .html or .jpg or what-have-you is simply ignored and the page is served up as-is. In theory you can change this behavior with the AcceptPathInfo setting (assuming Apache)-- but why the bleep should you have to?
Your search engine is willfully and wantonly attaching parameters to URLs that by their nature cannot have parameters. My own wmt parameters page begins with the line
attached to an html URL. (They'll only show you one, though they claim more.) I have to assume that g### picked it up via some linking site, where "newwindow" refers to the site's internal behavior; it's obviously meaningless in isolation.
Remember that indexing and crawling are separate functions; a search engine will happily index a page it has never seen. All you can do is go into gwt, pull up the parameters page and edit to say explicitly "no effect on page content".