It may occur that Drupal-based site previously working with clean URLs stop working and all content is unavailable. These are the possible reasons:

It is necessary to disable comments for nodes of a specified type. There should not be any comment, link on the form for adding a comment etc. when the node viewing.

This article would tell you how get know type of a current node (a node that is displayed). Editing form has no info about this.

Problem:
You need to show “Search” text to the respective field in search form. When user clicks on this field, the text should disappear.

This article would tell you how show article on the home page of your Drupal-based site on different languages. One of the possible ways is to output a node on the main page that will …

If there are a few languages on your Drupal-based site (the site is multilanguage) then logo and/or site name should refer to home page on the selected language rather than on the main site language.

When moving your site from one engine to another one, pages’ URLs are changed and you ma need to save oold URLs. First, there are links to these URLs from other sites, and search engines …

This article is actually a tip of how hide Body field. When hidden, Body will not be shown neither on a form nor when node viewing.

You need to create CCK-field. For example you may need to create CCK-field from hook_update_N.

Some modules work incorrectly with PHP 5.3. Many hosters have PHP 5.2 and you should have environment similar to server’s one for developing. Therefore it is necessary to downgrade php packet updates.