is request-type independent, since it stores variable into session.
Your issue has nothing to do with the type of request (POST/GET) - most likely the cause of problem is somewhere else… e.g. you may have two redirects coming after each other where the first one will read flash message and then following redirect would not find it…
in 1.1.9 this problem is still there. should it be considered a bug?
the problem is that Yii is not creating a new ID for the link/button inside the flash message. then it is duplicated and it triggers a wrong ajax request. i wish to use flash messages for undo operations…