Yep, I also faced the problem with iso higher then 3200. This must be the maximum of the sensor.
The past few weeks I had very little time

My tries vere mostly adding/replaceing strings in the system menu. No success. Now I'm tring to catch, waht happend when the camera is turned on, and laguage packs are initialized.
Meanwhile can we see your source for spot met., Factory mode atc?
Regards
A