Hi i had the same thing happen to me. I just sorted it myself and very please with the results.
I first adgusted the 3 main hinges from below first taking out the white plastic covers with a pen knife. Then i used an alen key to move the hinges up about 5 mm each. This help but did not fix it totaly. So I secondley unclipped the small white plastic covering a second hole which was on the side of the hunges facing the door. This also need an allen key. I only touched the top and middle hinge and turned these anti clockwise after i relised turning them clockwize made it worse. After a little trial and error my door now works perfectly just as it did the day it was fitted.
DeanO
September 2008