I tried but I can't change my gamertag. I wanted to get rid of the spaces in my gamertag so that it matches my username on other services like PSN (which does not allow spaces). However when I enter the new edited gamertag without spaces I'm told the new gamertag is already in use... (It isn't)
It seems the LIVE service ignores spaces and consider my new gamertag to be identical to the old one, and won't let me change or edit it.
Do I have to pay double and first change my gamertag to some random name, then back to my "old" (now edited) gamertag, or is there some other way of removing the spaces from my gamertag ?