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Reevaluate the search function available on codex and the rest of wordpress.
A good example of why the current search needs to be modified is attempting to search for your wiki user page. Lorelle yields too many irrelelvant results, and even searching for specifically User:Lorelle (Please!) comes up blank. How is this a useable search?
I've been quite frustrated with this a number of times. I write to make sure no such Codex: namespace page already exists, and to recommend Codex:Search strategy.
Threads on wp-docs: