Just after the v1.03 patch dropped just days ago for Injustice: Gods Among Us there were a few issues including an infinite for newly released 2nd official DLC character, Batgirl. Other issues deal with Wonder Woman and her B+3 recovery delay and the Red Hood Joker skin not being select-able after the latest update. In addition, it has been confirmed that a "full fix" will come later - possibly referring to the update/patch when the 3rd DLC character is released.
Hector and Paulo have confirmed recently via twitter that in order to have this hotfix implemented all you have to do is reboot your system. Paulo also mentions that they only fixed the infinite against 'another human' for now.
*Waits for the patch to patch the patch that patched the patch.*