Took my discovery for a new exhaust last summer and the idiot on the four poster ramp jacked it into the RSJ roof beam straight across the alpine windows but just behind the rear sunroof, here started my saga.
I was 5 weeks with a Nissan X-trail courtesy car before I got mine back (the body shop had a knackered beyond repair roof delivered from landrover to start with) but did I have a surpise, the built in shower.
I hadn't noticed the position of the handle for the rear sun roof - whipped handle off turned it 90 degrees and cranked it up to the park position, all fine now.
Check both your sunroofs, if one is slightly cracked open it's a problem. In mine the shower was always mine, right over the dash at the corner and also dripping from the rear view mirror.
Ooops!
Straight across!
My new roof, saved me having to wash the old one!
For larger pics:
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http://i15.tinypic.com/48q84sy.jpg
http://i16.tinypic.com/2efnxhf.jpg