Hi KimatARS:
I am having more or less the same problem as you. I upgraded to WordPress 3.3.1 and now I can’t post well, nor create pages, nor modify content.
I thought the problem was in the Qtranslate plugin configuration, but as I was investigating I saw lots of people complaining about the latest version of WordPress and how the editing page in /wp-admin doesnt look or work like the old one, disabling the options while editing a post, not being able to swith from HTML to VISUAL, the same with the images, cos we cant upload, etc.
I am here to ask you if you finally solved your problem and how. If not, just answer me and I might have the solution, only that I am waiting to discuss it with others before applying.
Remember, NO PROBLEMS, ONLY SOLUTIONS. Cheers !