I was also sometimes able to eat almost anything, but more often, had problems keeping things down. I didn't have a clue my band had slipped until my flouroscopy. If you're not losing 1 to 2 lbs a week, my Dr. said there could be a problem. I had stopped losing, and had "put up" with this for a few months, before I went in to be checked. He un-filled me for a couple of weeks to see if the band would re-position on it's own, but it didn't. The second surgery was much more complicated, due to all of the scar tissue, but it was the right thing to do. My advice to anyone who is "productive burping" is go immediately to your Dr. It may save you from a repeat performance!