http://www.keil.com/forum/docs/thread11248.asp
and
http://www.keil.com/forum/docs/thread11224.asp
both comes up with Preview and Clear - no 'Post' after clicking Preview (again and again)
OK, I should have said:
"It's these problems still: http://www.keil.com/forum/docs/thread11200.asp "
Both problems (missing 'Post' button & discarding posts) are documented in that thread.