I've disabled error reporting so this doesn't affect me, but I can browse to the twentyten or twentyeleven theme directory of almost any live WordPress site and it will throw an error. It varies from site to site, mostly it's an "headers already sent" error. But that's not really the point I'm trying to get across. It reveals the path to their site on their server. Again, this is for almost any live WordPress site that I visit. Seems like this would be a security issue. Did anything happen with recent updates to cause this? I don't seem to recall it in the past, but I seldom browse directly to that directory.
Here is the example, if you type this in your browser, it will throw the error and reveal the path to the website's server.