I previosuly used the FCKEditor WYSIWYG text editor for Drupal and then removed it to try out TinyMCE. Now to do that I disabled the module in Site Building>Modules and then deleted the FCKEditorfiles from the server in drupalroot>sites>all>modules.

Now I re-installed FCKEditor (after updating it from Drupal 5.4 to 5.5. The only difference was once line of code in one of the core files. I could have updated just that one line of code but  updating from Drupal 5.4 to the a version later than 5.5 would have been buggy since it was a core file that needed amending and not just another module.) and enabled the module and while I was about to write an a blog entry, I read an error that said a database table for FCKEditor was missing.

The reason for that was when I decided to use FCKEditor again, I uploaded the latest version and that needed a database update (instructions for updating the databse is in http://www.stevejbayer.com/drupal51/node/145.) Apparently updating is almost always necessary when a new version of a pre-existing module is enabled even if the file was disabled and deleted from the webserver, its database tables stay intact so when a newer version of the deleted module is added, a database update is required because disabling and removing a module does not affect the table structure created by the deleted module in the databse.