I am currently trying to update some examples to Myfaces 2.1.2 and ran into some ajax related problems. I have a h:selectBooleanCheckbox component that collapses and expands two input fields via f:ajax. There is a value change listener for the checkbox that sets the value internally and calls renderResponse(). In f:ajax, those input fields are also listed in execute to preserve the input the user has potentially made. So far, I had no problems with this solution. The validation for the input fields did not kick in (or did not bother me) and the values were preserved.
With 2.1.2 I have two issues:
1) Even if the input values are valid the values in the input fields vanish when they are expanded and collapsed again.
2) Now validation kicks in for invalid values and I get an error message in the browser
This works with all older versions I tried (2.0.4, 2.1.0 and 2.1.1).
Would be interesting to know what really changed here!