I have an NRS e140. There are bubbles that have formed under the material of the raft including the wear pads on the side tubes, the wear pads on the under side of tubes (where the bow and stern angle up), on the strips that cover the joining seams of the tube, and a couple on the floor. Most are on glued areas, but not all. When i say airbubbles, some are less then an inch around but stick up off the raft up to an inch. Almost like its a manufacturing defect (or like a blister when you burn your hand). Its not from inflating the raft as some of the materials the bubbles are on do not hold air (i.e, the wear pad on the side tube). The raft is still under warranty and was originally purchased by someone who did not know a lot about rafts straight from NRS. They said they thought it was suppose to be like this. Any ideas as to what might have caused this? I have not checked with NRS to check into warranty coverage on this. if you have any insight, that would be great. Just wanted to get a better idea.