Deleting a category does not delete the posts in that category. Instead, posts that were only assigned to the deleted category are set to the uncategorized category. Also, all Pages are assigned the uncategorized Category.
The uncategorized category cannot be deleted, however you can specify your default categories for posts on the Settings – Writing screen of the Administration Screens.
Backing Up Your Database and Restoring Your Database From Backup
You can use your .htaccess file to protect images from being hot linked, or, in other words, being linked-to from other websites. This can be a drain on your bandwidth, because if someone links directly to the image on your site, then you lose the bandwidth.
By default, WordPress reroutes a registered user to the Administration Screens after they log into the blog. To change the page, there are WordPress Plugins that can handle the redirect, or you can set the Theme function to handle it. See Function_Reference/wp_login_url.
A major release of WordPress happens every 6 months or so. Suggest and vote on ideas for future releases at the WordPress Extend Ideas site.
Also refer WordPress Versions for the chronologically listed versions of WordPress along with the Change Log information on new features and improvements in each version. There are the future releases and links to their respective milestones in the bug tracker.
Changing File Permissions
To get information about your server, you can use the phpinfo() function:
Paste this into text editor
<?php phpinfo(); ?>
Save as info.php Upload to server. Visit in your browser (www.example.com/info.php)
The info.php file returns a page outlining the details of your PHP installation. You can see if mod_rewrite is loaded. Under the apache header, look in the Loaded Modules section and see if mod_rewiite is listed.