How long have the gaps been appearing? Depending on where you or the installer started from my first recommendation would be to carefully work backwards and take the floor apart piece by piece to where the trouble area is. At that point you can see weather it is a few bad planks that got installed with broken click joints or an uneven sub-floor.
If that is out of the question for you then you could try to glue the "butt ends" and slide the pieces back together using a rubber mallet to try to shift the pieces back in place. This way has the potential to do some damage to the floor but if you are careful it can be done. Is there a lot of dirt build up in the gaps? Changes in weather and humidity will cause expansion and contraction of the floor which is normal but its should all move as one with the type of material you have. Do you have a humidifier in the house?
Last edited by flaming_potato; 02-25-2013 at 10:38 PM.
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