GoogleGuy explains that Google tries to crawl and index pages even when webmasters do things that could be considered rare or unusual.
[Link to quote
"Google, the problem is that we love you. You are one of us. The underdog that was built on brains not brawn, you're cool. So we expect more from you."
I hear you, Namaste. In this case, lgn put up a couple 301 redirects, and the second one interacted nastily with how we were rewriting the url. But you can be sure that I'm going to be bugging folks around here to see if we can handle that rare case with the 301 redirect better. The goal is to handle it correctly any time that a webmaster does something unusual; we're not there yet, but we want to get there. I know that people expect more from Google; it's something that I think about pretty much every day. That need to make sure that we're doing everything we can to be the best search engine possible makes things pretty stressful sometimes--but it also makes it pretty rewarding when you can roll out something that you know will just work right for most people without them having to do something special.
Okay, that last sentences doesn't parse so well, but I hope you get the idea. Anyone ever see L.A. Story? The "interesting word usements I structure"? :)