I can't believe that I've owned 3 previous Jayco RVs in 15 years and never registered for this forum until today. Anyway, my new 2015 White Hawk 24RKS is the second Jayco with a corner glass enclosed shower and the second that has the same problems with leakage as already been discussed.
I had to seal pretty much everything already mentioned inside the shower on my 2008 Eagle. I was hoping that Jayco (and every other manufacturer) had finally learned where all the showers leak and done something to fix it. I found this discussion searching for info on the problem.
Fortunately, we checked everything out by camping overnight in the driveway before taking it on a week long trip. The shower is the only problem, as I inspected the trailer and had the dealer fix any small problems before we took delivery. The water leaked onto the outside surface of the pan and underneath and into the bedroom. I watched during a spray test through the access panel opening and the water just seemed to pour out.
Unless I missed it in the discussions, another place to seal is at the ends of the channel below the door, as water runs to the end and then down into the glass panel channels. I'm going to try to not seal between the wall panels and the pan, as I don't see how water could get out through there, but who knows. I'll have to test it after all other places are sealed and cured.