each and every update I am running in the same problem, getting the WIFI to stop working with my companies Cisco LEAP.
Today I updated to Stock XLS8 JB 4.1.2 and WIFI is returning an authentication error.
I recreated the LEAP profile using the Leap Wifi Free app.
Last time I needed to patch the wpa_supplicant binary to get it working.
I also found some threads and also android bugs pointing to it (but this states it should work in 4.1.2 but not on 4.2: android issue #40023).
Do you have the same problems? Do you have a solution?
PS: Sorry if this topic is not new, search is currently not working.