I got that, I just don't necessarily agree with it. IMHO, if you've got a web app that users are savvy enough to know that they need, especially one that costs

I got that, I just don't necessarily agree with it. IMHO, if you've got a web app that users are savvy enough to know that they need, especially one that costs money, 9 times out of 10 they're going to be savvy enough to know that getting a 404 page with your branding on it is your company's problem, not theirs. I know this because I work for a company that provides an enterprise B2B web app, and customers already consistently blame the stuff that ISN'T our problem (connection, filters, ancient browser, javascript turned off, etc.) on us. And yes, a lot of 404's are due to improper URI entry and "cross-site link rot"... but isn't that a completely moot point since we're talking about internal links?