Version 2.5.12 became the official, 2.5.6 removed and 2.5.13 is the latest experimental.
2.5.12 - different handling of BIST and Murata flow - improves stability.
2.5.13 - sets default (after factory reset) values to 1275/288 in SP3x/SP2x. Redirection bug fixed. Handling of ambient temperatures lower then 0c added.
So which firmware should I install on an Emerson PSU set I currently have 2.5.1 and its still unstable not getting more than 3TH and asics keep failing with that loop error.
I rue the day I updated my firmware when I was happily hashing at around 4.5 TH for months.