: There may be a pinhole on the inside letting water at the plywood, but
: without seeing the spot, it's hard to know. It would be unusual for a pin
: hole to show discoloration so fast. Any way you can post a picture?

I don't have a digital camera so can't post a picture quickly. I will try and get a regular one taken and scanned in. If I take a flashlight and shine it directly on the areas, the darkened area disappears and the wood is visible and it looks fine. So, the discoloration looks like it MAY not be on the plywood (just in the finish) but it's hard to tell.

Jenny