There are WAY TOO MANY 90% FAILS!!!!
I have delayed posting this, but when i get them consistently, it gets annoying...

90% is not 100%

Yes, but it is essentially 9/10 times you will get the planet....i get the planets that are at 90% about 2-4/10

We had someone fail 11 times in a row with 90% each time. That sucked!

EXACTLY>THAT SHOULDNT HAPPEN IN THE GAME!!

90% is a percentage, the game does not count how many time you invaded sucessfully and then make you fail on the 10th time. It is 90% chance.
So it will happened.

First, the 90% chance against a completely defenceless planet thing should be fixed. If it's defenceless, you should get it immediately. No defence = no resistance.

i like the 90% for undefended planets but i think if you can overpower the planet you should be able to get a 95% chance sucess

I too think it is broken. In particular it seems that 0 def planets don't follow the rules, as I hear more failures on those than on minimally defended planets (bug?). Maybe Dan could log these events when it is 90%+ calculated but there was a failure and see if it's true, even for a 24hr period should prove it one way or the other.

I think the pecentage isnt for an invasion...
its the chance you will be Stupidly F***ed off if you fail X-D

its really only 9/10 as the number of attempts approaches infinity. Your sample size is too small to determine that it isn't.

you don't lose all your money at the casinos and then complain that they fix the slot machines because you lost all your money
just because you failed the last 20 times does NOT mean you will succeed on the next one
as i have said in another thread (somewhere around here)... your history has no bearing on future outcomes

and if you've failed 11 times in a row...... that's pretty good odds... you probably should have spent your time on lottery tickets rather than on GL