LEAVE IT TO FACEBOOK...
...to randomly change the ground under your feet. Of all the things which are important to your business' web presence, the addresses people use to find you is near the top of the list. Lose your URL and you can become invisible.
However, URLs pose another problem which most businesses don't take into consideration: the fact that you can have too many URLs for the same web property. And now it seems that Facebook has decided to give your business page one more.
Big deal, you might say? Well if you're a large organization with lots of brands or locations, your problems just got multiplied...