Up to 9lbs of bloat for me until I gave up corn, legumes, deadly nightshade, cow's dairy. Perhaps 2 inches on the waistline.
It was even more noticeable when I used to eat gluten-containing grains.
If you have food intolerances, weight fluctuations due to the water retention from that can be much more significant than the fluctuations in glycogen + associated water in the muscles.
Also cardio exercise can cause a bit of bloating from the histamine released.
For example, I exercise a lot and now my weight only fluctuates by 2-3 lbs from day to day, whereas with food intolerances it was 6-9 lbs.
F 5 ft 3. HW: 196 lbs. Primal SW (May 2011): 182 lbs (42% BF)... W June '12: 160 lbs (29% BF) (UK size 12, US size 8). GW: ~24% BF - have ditched the scales til I fit into a pair of UK size 10 bootcut jeans. Currently aligning towards 'The Perfect Health Diet' having swapped some fat for potatoes.