Last night about 3am we had a huge storm and although we leaned the coach over toward the driver side so the rain would slide off rather than pooling up. Apparently we had some leaves stuck in the bladder and this caused water to seep in.
It was suggested that I run a bead of silicone (will use polyurethane for windshields) parallel to the direction of the slide room (east/west) in order to run the water coming off the roof around the creases in the slide. I'll talk to Newell and see if this is a fix for the problems we are having still - we are down to only getting water inside when it deluges rain...
One quick temporary solution that might work is to put some wide "painters tape" around the perimeter when you expect a rain storm. It might last through the storm and should keep out most of the water.