You'll probably find it coming in other places as well. I replaced my vent seals (original parts the best), door seals. Most of my leaks came through the roof panel seams though. A hairline crack can easily appear which is not necessarily visible. As the roof is flat a slight hollow appears (l can see a puddle onmy roof now as it is raining) of that hollow is next to a crack in the seam it will get in and run down into the inner gutter and then into the front a pillar and down into the footwell area. A smear of RTV has sealed these and so far nothing getting in! This is a fix that no dealer has been able to use! At the same time I have sealed the windscreen mount seal, the wiper spindle mounts and new gaskets and joints on the dummy hinge brackets. My next target is the windscreen rubber.
Incidentally I think the 2007 models have a two piece roof as opposed to the old 4 without the longitudanal seams on the rear section. It has only taken LR 20 years!