>If two pages have the same URI, it has a lot of effects. The browser will treat them the same for bookmarking purposes.

Actually, I tend to bookmark app.cgi?mode=edit seperately to app.cgi?mode=list and use them that way. But I'm talking about applications I write for myself alone mostly, so yes, you're right that the user-perspective is altered by the single-script method.

Thank you all very much for your input. I feel vindicated, and also educated.
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“Every bit of code is either naturally related to the problem at hand, or else it's an accidental side effect of the fact that you happened to solve the problem using a digital computer.”
M-J D