Over the past few days I've been experimenting with MK9 in an attempt to discover new glitches. I seem to have come across a bug where the same moves will deal different amounts of damage in the same exact situations:
Two days ago, I was playing on Xbox Live as Scorpion against a Cyrax in ranked. He had not hit me once, with the exception of a throw attempt that I escaped. Even though the throw was evaded, it somehow managed to do .0001% damage - which was not enough to move my lifebar but was enough to swipe away my Flawless Victory. This match was recorded and later uploaded to YouTube.
Yesterday, I was playing as Scorpion versus a Sheeva also in ranked. They too had not hit me once with the same exception of a throw attempt that I again, had escaped. This time I was awarded the Flawless Victory. I would have to go through my videos, but I'm 99% sure that this match was also recorded.
So you have two situations where the only move that landed was a throw attempt, both of which were evaded but one of them did damage, and the other did not. I don't know if it's a character specific problem where Sheeva's missed throw doesn't do damage and Cyrax's does, but I can't see this being intentionally implemented. The fact that there's no question the grabs connected rules out the possibility of lag being the cause.
The reason I say this may be a serious gameplay issue is because later on during my testing, a Smoke I fought did a teleport that didn't connect at all while I was standing right there, hinting that this problem may affect regular and/or special moves too. This was also uploaded and had the move connected the way it should've, my opponent might have won instead. If this is a more widespread issue than currently perceived, it can end up costing players the match. Another example would be if say, a blocked ninja slide did 1% damage and was enough to take out the rest of your opponents lifebar in one match, but not in another.