Stern Pinball INC. strongly recommends updating the software for all Whoa Nellie, KISS, and WWE games.
This Spike System Kernel (operating system) update is designed to improve system reliability by making the kernel software more tolerant to performance variables in SD cards from numerous manufacturers.
In addition, it addresses a game system software bug that affected flipper performance under certain conditions.
Update Revision Numbers: Whoa Nellie v1.52
KISS (Pro) v1.03
KISS (LE) v1.03
WWE (Pro and LE) v1.19