After upgrade to Nette 2.2, method redrawControl() doesn't work as expected in some our projects.

When i have simple snippet, which is invalidated by signal, it works great.

When i have form in snippet "myForm" and form is sent by ajaxSubmit(), form is successfully processed with inserted "thank you message", but $this->redrawControl('myForm'); doesn't work. Ajax response body is whole HTML page with empty JSON after HTML, instead of JSON only.

With enabled output buffering by ob_start(), response looks like:

...
</body>
</html>
{"state":[]}

With disabled output buffering, error below occurs (whole HTML is sent ahead of JSON, which is trying to set json header):

Cannot send header after HTTP headers have been sent

See also: http://forum.nette.org/cs/17836-cannot-send-header-after-http-ajaxovy-pozadavek

Do you have any ideas? Before upgrade to Nette 2.2 it worked perfectly.