Broke the diamond boxes on the Warehouse level and couldn't grab the 3 diamonds from the first box I broke. The position of the diamonds != what was shown on screen. As you can see from this screenshot [i.imgur.com] the characters can walk over the diamonds but they cant walk over an empty spot of the map that should be accesible. Also the boxes overlap, i dont think that should be possible.

I believe I had a similar thing happen in a previous level when i opened a briefcase the item inside ended up below a desk and i had no idea what the item actually was and I was not able to reach it. My guess is the trajectory at which the items fly out of the boxes dont take other items around into account.