Depending on how you feel, the newly discovered TAC infinites are keeping you attached to Ultimate Marvel vs. Capcom 3 (UMvC3), or keeping you away.
Opponents of the exploit can now rest, after Evo that is. UMvC3 producer Ryota Niitsuma took to Twitter (via Zhi) to reveal a fix is in the works for these infinites.
Here is the quote:
"I've received many reports regarding UMVC3. Currently, I am adjusting the mechanics related to the problem."
For examples of the TAC bug, click here, here, here, and here.