I have seen comments from a few people who had to fiddle with the connectors to get them to work and also have a friend who sent back the retail version he had because he didn't like the swivel connector plus he had issues with it connecting properly at the start. So I personally will be waiting several months to see if this potential issue turns out to be a non-issue or a real pain for the owners of the UE900. Having been burned by this issue with my Shure 215's I have ZERO desire to have the hassle of this problem on a $400 IEM. The only way I will change my mind is if the reviews of these from a sonic perspective intrigue me enough to want them AND a major chain retailer starts to carry them and can purchase an Instant product replacement plan.
I was one that had to do it. I did get it fixed, but UE wants to still look at it so they can, I assume (I know, I know), fix it for future productions of the 900s. UE is aware of this problem. These unforeseen problems are normally seen more from headphones that come first off the line. The second wave shouldn't have these. I could be wrong though. Furthermore, I'd like to address some misconceptions that may be out there. My 900s do work, I have been using them all day actually as something to listen to to and from school. The problem is gone, which means it's not there, nor can I force the problem to persist (I had to force the 900s to cut out when I first got them). I think it may have been some left over fluids from manufacturing that got into the right contact (light layer of grease) that cut out connection temporarily when moved. I can force a similar effect when I twist the headphone jack of my iPod back and forth. So they are not broken, and do function perfectly at this point in time. UE does want to look at the 900s though.