title: "system." In a Collection Name in MongoDB
body: <p>I just discovered a bizarre behavior exhibited by MongoDB.</p>
  
  <p>Apparently, any collection name with the string "system." anywhere in it will just not function correctly.</p>
  
  <p>To make matters worse, it won't even tell you anything is wrong!</p>
  
  <p>It's really more a matter of curiosity, but does anybody have any idea why this would happen?  Is it documented somewhere?</p>
  
  <p>My assumption is that it uses ""system.*" collections to store things internally (like indexes) and doesn't want you messing with them, but this doesn't seem like the correct behavior to me.</p>