The current main release is 22.214.171.124, the current "controlled" release is 126.96.36.199. (Information on controlled VS main release: https://community.mcafee.com/community/business/email_web/webgateway/blog/2011/0 8/01/mcafee-web-gateway-controlled-release--what-does-that-mean).
The release notes can be found at: https://kc.mcafee.com/corporate/index?page=content&id=KB68751
I dont recall any specific certificate issues with that version.
Installed today, waiting to see if anything weird occurs.
Edited for clarity.
I just installed 188.8.131.52 yesterday. Upgraded from 184.108.40.206
I have no issues so far. The UI seems to load faster for me too.