JBossDeveloper

blame on me. I managed to fix the issue. My conclusions are:
- that was not an RF problem
- in order to make reRendering work we don't need to place modal panels inside ajax regions nor in a4j:forms (or at least it is optional)
- we don't need any tricky workarounds, just use normal a4j:support and reRender with normal id-naming syntax (as usual).
- it is not needed to fully qualify the id as someone (and myself in first place) suggested.

What was the problem and how I solved it:
- the problem was with my code not RF code, the method supposed to update the view didn't work as expected under every use-case
- so the fix is simple: just follow the documents!!

What i can suggest to people who still got problems:
- first make sure you read carefully the documents and understand the examples
- if your View-code looks really like the examples in the documents then
you have probably a problem with your own code (as in my case)
- solving the problem now is not a matter of doing some strange mix of RF tags but to discover what is the piece of code is not working as expected. Search first in action-methods supposed to update the model/view

that is not 'my recipe', is what we can find in the documents. I'm confident
i was not the only one to experience this issue due to oversights in my own code. I found unit testing really helpfull.

Thanks everybody for the help, I hope we will be of help to each other also in the future as we were in this occasion

Thanks to the staff for the hard work

regards :)