Gitzo 2220 - Loose flip locks
I've heard that this is a common problem with the Gitzo Explorer tripods, even the current line of them. I had a B&H salesman shake his head with grief when I pointed out an Explorer on the showroom floor for just this reason.
There is a way to tighten the leg connections you'll just have to do a search to find out how. Of course I don't know how since I don't have one of these tripods.