Terrance,
If I'm understanding you correctly, it sounds like you are saying the raise rule in France does not allow a true minimum raise. Limit poker is easy to figure and I'm sure you're referring to no limit.
If a player wagers 100 and the next player raises to 200 (double or 100 more), this is the minimum allowable raise, of course.

The next player is facing a 200 wager...his options are: fold, call 200, or raise. The question is: how much can he raise? In no limit we know he can put in all of his chips by going all-in. What is the minimum raise he can make? The only answer is 100 more, which would make his bet 300 (100+100+100). I'm afraid that you are saying in France, the min raise must double the 200 bet he is facing. If I'm correct, there is a serious problem in all of France when it comes to no limit poker!
Before I continue, I'd like some clarification on this. I'd also like to move this topic to it's proper location.