15 minute Roll Back at 3am
10 to 15 minutes after the initial v1.150 patch we had to do a server roll back to repair the patch. Any rested time used or progress made in that 15 minutes was reverted to it's former state. We apologize for this inconvenience.
Computing the probability that at least one of the following events will occur:
P(a or b ... or z) = 1 - P(!a and !b ... and !z)