23/11 recommended UPDATEstable now I would say

https://mega.nz/#!i5gyzSJY!IweNLt7F9mRT-wVwPX1ATkwF1Zz_keHSJ9Jg5wmNj04
Changes 23/11: (compared to 21/11)- fast mining startup after changing settings / reboot (~19 seconds vs ~50 seconds in the previous firmwares). Safes you some time when experimenting with settings.
- adds the reboot on low hashrate option (checks every 2 minutes and kicks in when the hashrate is measured below 88% of the expected hashrate)
- ~ 1% improvement on effective average hashrate *jeeej*
- fixed flash upgrade speed to new versions
- added AUTO FAN profiles. The default profile is the one that's in since the start, the performance is more like the stock bitmain auto fan profile and the silent profile keeps things nice and quiet. Manual mode is for setting a static fan speed.
know issues:[/b]
- switching pools can sometimes cause the miner to wait for work for 10 seconds.
happy mining!