(Finally) upgraded to v3.6.5 Everything works well ... except one thing. I added in the earlyer version an extra user profile field (multiple-selection checkbox, required field).
It worked ok. After upgrading to v3.6.5, if you want to register as a new member, you can select the desired option for this profile field. When you click 'complete registration' you get the error message: 'A required field xxx is missing or has an invalid value'. Did i forgot someting to do after upgrading?
In
this thread you can see the kind of code used.