So I needed to do a migration from a wordpress blog from one server to another, when finished I noticed that my page will post and widgets was not working properly, the page disappeared example of post pro box to edit the text visually, the edit box that bold, underline etc. My first idea was to install a wordpress zerom downloaded from the official site and installed the same problem occurred, so I decided to talk with a friend who works with web development, and she said that this happens too many times from version 3.xx, and that after a while she tries to check back again to work alone, it seems to me not a problem in the browser, but the application .. for example the blog I'm using version 2.9.2 works perfectly and it never happened.