Well, yes and no. Google does specifically allow that behavior as part of their versioning policy (http://code.google.com/apis/libraries/devguide.html#versionin

Well, yes and no. Google does specifically allow that behavior as part of their versioning policy (http://code.google.com/apis/libraries/devguide.html#versioning http://code.google.com/apis/libraries/devguide.html#versioni...). However, in a production environment, you really shouldn't be automatically loading the latest release of jQuery; what happens if there's a regression that affects your application's performance? Regardless, I don't think that URL should be down.