It wasn't dead. It was just idle for a while. The current question was relevant to the old thread. Breaking this out is silly. Also, the old thread has high Google ranks.
Okay I replaced the valve kit, both spout bearings, and both O-rings. Leak is gone. Yah! That was easy. I should have done it months ago! And to think my wife wanted to call a plumber. :)
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I have a Kohler kitchen faucet that I bought at Home Depot and installed myself a few years ago. It is "Forte single-control kitchen sink faucet with sidespray and lever handle" (model number...