It can affect what domain you end up at though, for example: http://foo:bar.com\@example.com http://foo:bar.com\@example.com Chrome/Webkit browsers will go to

It can affect what domain you end up at though, for example: http://foo:bar.com\@example.com http://foo:bar.com\@example.com Chrome/Webkit browsers will go to `bar.com` but Firefox will end up at `example.com` for the same URL! There's a fantastic book called "The Tangled Web" that has lots of examples of these pitfalls.