PARTIALLY SOLVED:
I’ve upgrade WP to 3.4.1 and now it looked like it was working…(no more HTTP 500 error or clear JS conflict)
BUT
Page/articles editor doesn’t show content (title and body)…like font color was WHITE (!)…if you select (CTRL + A) title/body field you can still see text. Further more you can’t switch between Visual/HTML view (maybe js issue…).
Final problem: when I add a package, after press “create package” button I get a blank page with this line written: {“result”:”success”,”id”:2}
PLEASE HELP!!!