We recently install about 700 sq/ft of the Kronotex flooring in our kitchen, diningroom, livingroom and hallway.  It looks fantastic compared to what we had there.  We are however having a small problem, in from of the bathroom door in the hallway and in the doorway of the kitchen we have a couple of spots that look like the floor has shifted?  Maybe that's not quite right but it looks as though the boards have seperated slightly and one side isn't locked in to the other board properly.
Anyone else had this problem?  I know it's not from moisture, perhaps from some dirt that was trapped in the groove of the boards during installation?  I'm at a lose as to what to do about it, can this be fixed?  Can someone shed some light for me?
Thanks :?