oh, this function doesn't try to replicate the end result of an rewritten url. It's main purpose it's to let any url in a state that the other core methods will be able to perform its operations. Before the usage stats plugin, we didn't need that, because we didn't had to handle with rewritten urls, or urls that had index.php on it. Now we have this use case when processing log files. So I think that the method name could be another one, like _transformUrl(), for example. And its description should be closer to what I described here. What you think?