The entire point of this update is Android 4.2 compatibility. 4.2 was only released earlier today, so if you expected full multi-user goodness with SuperSU so quickly, you overestimated my capabilities ;)
This covers the SGH-I317 and SGH-I317M models.
Adds support for:
Guidelines for problem-free su usage
SHV-E210K, SHV-E210S, SHV-E210L:
... lly enjoy DSLR Controller :)