Leaking deck joint? Sun Od 32

[Plevier]

In the forecabin of my 2003 Sun Odyssey 32 there is a stringer formed in the GRP about a foot below the deck. It also serves as a storage shelf, and a wooden fiddle rail is screwed to the shelf. You can see it here:
http://www.yachtsnet.co.uk/archives/sun-odyssey-32/s610-forecabin.jpg (thank you Yachtsnet) and on the port side you can make out the countersunk fixing screws as light spots.

On one side only, I noticed yesterday a tiny dark patch of dampness around each of these countersunk screwholes.

The horrid thought is a deck join leak - possibly at a stanchion base - and water creeping down behind the foam backed(?) vinyl wall liner and escaping at the screw punctures. I find it a bit surprising it has spread to all of them along a 4ft length though and when you press the vinyl lining it doesn't feel soggy or particularly cold.

I wondered if anyone has had the same happen or can offer a more palatable explanation?

Thanks.

 

[bobgoode]

THe water tank filler is mounted on the deck, port side. It enters the cabin just above the wardrobe. The pipe could have a leak at the deck and water run down to the shelf. Happened on a fiends 40.

 

[Saltie]

I had problems last year with rainwater leaking into the forepeak, port side and traced that to a poorly fitted toerail. Not due to the builders but another yards repair prior to my purchase.

I now have another rain water leak further aft, again port side, coming in either side of the bulkhead dividing the heads and the aft cabin. I suspect its more of the same. More work to do at annual refit.

Don