Moderator
t-p
(@t-p)
– Check that anti-hotlinking of images isn’t enabled in your hosting account. If it is, try disabling it.
– Check your uploads path in Dashboard, Settings, Media, Store uploads in this folder . . . normally this would be blank.
– Try changing the permissions on the wp-content directory to 766. If you still have problems, try 767, 775 or 777.
Once your uploads are working, change the permissions on wp-content back to 755 again (very important for security reasons!) and check that everything still works OK.Documentation: http://codex.wordpress.org/Changing_File_Permissions
– If the above steps do not help, try deactivating ALL plugins temporarily to narrow down the problem. If the problem goes away, activate them individually (one-by-one) to find the problematic plugin.