Author's note (July 2016): The answer below was written in 2011, and is still working in Google Search. I have published new extensions that use a different method to remove the search result indirection, which works on even more Google sites and on mobile.
TL;DR: Don't track me Google is a user script Don't track me Google is an extension I made that allows you to copy normal URLs, while hiding the referrer to the sites you're visiting.
Installation
Explanation
I have written a method which replaces the link-modifying rwt function with a bogus function that can't be touched by Google.
By preventing Google from overwriting the rwt function, the link cannot be modified any more. This method depends on the Object.defineProperty method (Firefox 4+ and Chrome 5+). The fallback requires Firefox 2+ and Chrome 1+.
Firefox 2+
If you only want to remove the link-modifying behaviour, and not care about showing your search queries through the referrer, this GreaseMonkey script can be used:
(very non-strict @include rules using wildcards and the Magic TLD)
// ==UserScript==
// @name Don't track me Google
// @namespace Rob W
// @include http://*.google.tld/*
// @include https://*.google.tld/*
// @version 1.2
// @grant none
// ==/UserScript==
"use strict";
if (Object.defineProperty) {
Object.defineProperty(unsafeWindow,"rwt", {value: function(){return !0;}, writable: false });
} else {
unsafeWindow.__defineGetter__('rwt',function(){return function(){return !0}});
}
Google Chrome does not support Magic TLDs, so the closest you can get is *://*.google.com/* (repeat the rule, replace .com with other supported Google TLDs).
In Chrome, scripts have to be injected in the form of a <script> tag, because Content scripts are executed in an "isolated world".
Chrome & Firefox 2+ - Link to source code
On January 21st, 2012, I published an extended version, which includes a referrer-hiding method, so that others cannot see your search query. This greatly improves your privacy.
(Update from 2016: this referrer hiding is not needed any more in modern browser because of the referrer policy, which only shows the domain in the Referer header)
The site: operator allows you to restrict results to a domain. It may be applied to a top-level domain (ex. .com, .org), second-level domain (ex. google.com), or any higher-level domain (ex. gaming.stackexchange.com). There must not be a space between the colon in site: and the start of the domain.
To limit search results to the .edu top-level domain, add the site:.edu term to the query.
For more information about the site: and other advanced operators, see http://support.google.com/websearch/bin/answer.py?hl=en&answer=136861.
Best Answer
Try with browser in private navigation mode. If that works, consider to delete the cookies related to google.com and Google local pages [1].
Also you could try setting a location. From [2]:
Referencees
[1] Google.com goes to the wrong Google page
[2] Change your location on Google