got it solved.. apparently its not myfaces.. rather its the tcnative (tomcat native code to make tomcat go faster) that's causing it sometimes, it can't parse the post parameters properly.. the logs are full of this
so when it can't parse ViewState parameter, i doesn't know the viewstate but it receieved the post URL, kicking me back to the originating url since jsf spec says form submition = send post to self i removed the tcnative libraries and everything seems ok probably i'l ask the tomcat guys about this...
