I was using WordPress 3.1.3. I also used WordPress 3.1.0, 3.1.1 and 3.1.2, but all with them, I got the image uploading problem. But in wordpress 3.0.4 (now I am using this version) is out of that problem. And now I will tell you that how to back into wordpress 3.0 version or later. But one thing, remember, it is not easy if you have not enough idea about that as it will destroy your hole site if you miss.
Well, I did this trough my cPanel (Hosting control panel). If you have hosting control panel, open it and go to the file manager and open the root of your wordpress directory. First, we will take a backup for the necessary files to skip any risk. Well, make a folder named "Backup" or anything you like. Now copy the file named "wp-config.php" (Select and see the top menu of the window to get the Copy option. You may als0 get this option by right click upon that file. Choose the directory for copy on the upcoming dialog box) into the backup folder. wp-config.php contains the database name, site host, username and password and more information of your hosting to connect with the database and run your site. Now back to the root folder and select the wp-content to make a zip copy of that folder(See the upper menu and choose Compress). wp-content contains all the themes, plugins and media files uploaded through WordPress. Now make a backup of the wp-content.zip (or what folder extension you chooses for to compress the wp-content folder) Continue reading How to back to wordpress 3.0 – Old version