I've been saying this for a couple of months but I've just now found some interesting PubMed articles that point to some really neat connections between CCK release and gluten intolerance.
Long, boring article short, gluten intolerance can cause some major gallbladder issues. These have been show to be resolved by removing gluten from the diet.
From the middle link: (emphasis added)
In patients at diagnosis, elevated somatostatin levels were associated with increased gallbladder fasting volume, whereas decreased cholecystokinin secretion was responsible for the reduced gallbladder emptying. Gluten-free diet reversed these abnormalities.