Drupal - Edit Tab Disappeared

Where did my edit tab go?

Have the edit tab disappear on a page (particularly the homepage) for one of your Drupal users?  The first thing you want to check is that they have page access and edit permissions under access control.  The second thing you should check is to confirm that the user that doesn't see the edit tab does in fact have permissions for the user role that has page edit permissions.  Finally, make sure the page the edit tab doesn't appear on has the input format set to one (ie. "full html") that the user is allowed to use.  If, for example, the input format to be set to "php code," and the user doesn't have access to that input format, the edit tab won't appear.

Still no edit tab?  Verify your cache settings

If all of the above suggestions don't bring back your edit tab - try turning off your cache.  It appears that, especially with Drupal 4.7.x and earlier, Internet Explorer doesn't cooperate with Drupal's cache handling mechanism.  After you've disabled the cache, you'll want to clear out temporary Internet files (the cache) and restart Internet Explorer (or use Ctrl + F5 to force a refresh). Read our article on How to Clear Cache in Various Browsers (and Why) to learn how to clear your cache. 

Clearing your Drupal database cache

As a final resort - if you've disabled your Drupal cache and cleared your browser cache and are getting "access denied" errors (instead of seeing the "edit" tab) - you should try emptying the "cache" table from your Drupal database.  Simply log in to phpMyAdmin, click on the "cache" table, and click "empty" (or execute a "truncate" mysql statement).