Here's what I discovered when we were prepping to leave the house last week, for the holidays. I cleaned out the fridge, loaded the dishwasher, and went under the sink for the dishwasher detergent. And Low! and Behold! a Christmas miracle. A hole appeared in the drain pipe of my sink and has been leaking slightly for god-knows-long (enough to damage the wood of the counter bottom).

EZ enough fix, but it was catastrophically bad timing. Turned off the water, turned off the DW, and left for Christmas.
You can see the small oblong hole above the wrench handle. For the life of me, it looks like someone banged the hole in the pipe. Home again tonight, so I guess I know what my first project tomorrow is....