I know I shouldn't rise to the bait - but I am big enough and ugly enough to take care of myself - but I have to say I resent the tone and hate the 'he who shouts loudest gets attention' thing that you have going on there:
Go on then give us the url and when I find the problem is already covered in the thread I will invite you to delete the post - how's that. I don't know what convinced you that this thread had much to do with the specific problems of upgrading, but I can assure you that following the steps listed above will identify the issue in the vast majority (99%) of cases of admin menu's not working.
When I started the thread I was referring to menus that were present in the page but that did not appear to do anything.
This specific message from this thread may also be relevant:
http://forum.joomla.org/index.php/topic ... #msg130555
I notice in another thread today you mentioned having permissions problems - this is another likely candidate.
If a .js file cannot be accessed then the menus may disappear.
PM me the url, and an admin username / password and I will look into the matter for you.