A new bug that seems to happen with 2.4 is that sometimes when a profile is found while spoofing, the app will just force close or go into "Faceniff has stopped working" etc. My device vibrates that I have found a profile and I get to see it in the list for a millisecond before the app crashes.
I don't know if this happened with 2.3 because I never got to try it.
It doesn't always happen but it does hinder the app from working properly... I am not sure if there is an underlying bug because 2.4 seems to capture less profiles than 2.1b.. Even though it's quite stable and designed for ICS/JB etc.
2.1b seems to capture more profiles but it's very unstable on ICS/JB.
It's really hard to recreate this bug because it's random whenever it happens...
ROM: 4.1.2 NEE STOCK
Rooted and latest Busybox
Phone: Galaxy S3