I agree with Moog, one size doesn't fit all. I think 1200 is recommended as the minimum because it gives a good chance of getting in all the nutrients you need if you are reducing your cals without supervision and support from someone qualified. If you are going below it might be a good idea to get support from a nutritionist to make sure you're not missing out on anything.
Look at Moogs diary, she is doing fabulously on a supervised very low calorie diet, and eats a yummy sounding variety of foods on a very small calorie limit.
I was eating too little and hit a plateu for 8/9 weeks at 15 stone, when I increased my cals I had an initial gain, but now I'm back to losing again nice and regular like I used to. Plus people on here will tell you that I'm much less grumpy now I'm allowing myself a few more cals. Plus plus now I'm using myfitnesspal I've figured out that on days when I do exercise I can eat even more, and that has made me over joyed!!! lol!!!
Good luck. xxx