I have upgraded my routers from 5.xx to 6.10 - much working smoothly except:
a) UPnP does not seem to work anymore - the previously working configuration, which was not complicated in any way, is now not working. No errors, no reports, just not working; and
b) OpenVPN does not seem to be working either. My link used CACert certificate authentication, and the certificates were out of date as the VPN had been disabled for a while, so this may be finger trouble, but there is a log report that 'requesting-ca-capabilities failed'.
Any thoughts of a constructive nature gratefully received.