I have this same thing! It's only under the tape part. I thought I was weird or something. I have no idea what causes it or how to get rid of it, but I'm just happy that it's not just me.
I will be keeping an eye on this to see if there are any solutions shared.
blueglass: I use the Adapt barrier rings which I believe are similar to the sure seals.
UC dx 2/08
Done with the drugs. Step 1 (of 3) J-pouch surgery 3/22/11, Steps 2 & 3 TBD