Nevermind. I re-installed theme, deleted a couple of plugins and now everything’s working fine.
		
	 
	
	
	
 
		
			
	
	
		
		UPDATE: I used Theme test drive plugin and found out:
TinyMCE works on Twenty Eleven and Twenty Twelve WP themes, but I can only use the “text” tab buttons. In fact there’s no “visual” tab at all.
When I switch back to WildCommunity (my current theme), I see this blank area with no buttons at all. Visual and text tabs are useless.
By the way I can type inside the blank box but text is white and I need to select (highlight) it to see what I wrote. If i hit “post” I’m perfectly able to post a topic. Text and links look fine. No problem. Now THAT is weird! 
Any clue?
		
	 
	
	
	
 
		
			
	
	
		
		I was about to ask the same question. Anyone??