I using wordpress 3.4.2 for my blog's and sites. One of this sites have strange problem with backend. Every dropdown menu on leftside area in admin panel does not work. When I go to add new article or page, body of article doesn't show, except when I select the text. I try to reinstall it, but withot results. I disable all installed plugins, but no results. If someone have same problem and was fixed, please tell me how.
Thank you very much!