1- on the sill, totally dry, when i put the winter plastic on the interior window ledge in november, it wasn't there, drywall is totally dry, above and below frame, no other discolorations anywhere else visible. 2-1in x 3 in, very small reeally. 3-yes, no water pipes on that side of the house, for rain to come in thru that window, it'd have to be parallel to ground, so my unproved suspicion is channeling of water along the support interior framing....however, i will go outside, when someone is here to hold the ladder in place, and look along the exterior window frames on that side of the house for any other visible problems. thanks, i appreciate your questions, this helps.