Huh, this is the first reported bug I've seen that I can't immediately put my finger on the cause...
But now that I think of it, the only explanation must be that the UI somehow didn't update properly and the real chance is 53%. I believe the '9' was probably printed as part of something else. The reason being is that no matter how good you are, your hit chance is capped at 95% to account for random flukes. You know, like a d20 roll of 1
. So 539% is literally impossible in the mechanics.
I'll look at the UI code again. It did undergo a couple changes not long before release...
Thanks for the screenshot!