Apps rise and fall on single characters. One misplaced character can tank ten thousand lines of code. The same is true with URL redirection. Most DNS providers have a GUI for redirecting URLs. I’ve learned the hard way that the forward slash character is of utmost importance when using these features. For example, if I want to forward all www traffic to http://coderrr.com (sans slash), all of my traffic for www will end up only on my homepage which is no good for SEO, analytics, user experience, etc…. If I want the DNS provider to forward the entire request, I have to have a trailing slash (http://coderrr.com/).