I have wallpaper site, every time a try to add any comment of a link. this message shows Error saving template! Check your permissions (chmod 666). can anyone explain what it means? thanks
Permissions determine who can read, write, and execute files. In an FTP program, click on a file or folder and open the permissions dialog. There are heaps of tutorials that explain it better, like this one: http://codex.wordpress.org/Changing_File_Permissions But you really need to understand what you are doing before messing with permissions. Get it wrong and hackers will destroy your site.