I have made a comment on my serial no. Vs Firmware & cal date repository regarding firmware version 1.20.3.
This was reported by one person to have been installed in a repaired E4. Those aware of that persons statement will know of its stated implications. The reporter was a brand new member of the forum with no provenance to the statement. At the time I advised readers to 'Panic Slowly' until more information was received.
I have made efforts to confirm the existance of the 1.20.3 firmware and there is absolutley no independant verification if its existance.
Firmware 1.19.8 was still being installed on 25 Novemeber 2013. It is time, IMHO, to declare the report of 1.20.3 to be an error or hoax, and not applicable to the present releases of E4's from Estonia.
There is the likelihood that FLIR will release new firmware in the future with any bug fixes that have been reported. There is no official comment from FLIR on the recent E4 improvement program that users have instigated. It is not possible to predict what, if any, action is taken to make such improvement difficult.
I shall continue to log serial numbers against firmware and calibration dates as the archive may be of future interest to forum members.