This page will list instructions (or links to instructions) on upgrading between various versions. If you're making a rather large jump between versions, then you'll have to read all of the notes for each version in between.
There is a new configuration variable, $SpamLogging located in the config.pl directory. The default is 0 (disable), however you may want to merge the changes in the config.pl.dist with your local config.pl (retaining your modifications, while importing the new options).
Themes have been moved around a bit. Previously, they were stored in a directory called templates in your data directory. This directory has been renamed to themes to avoid confusion with actual page Templates and the themes. Before upgrading your install, you could rename the templates directory to themes.
No changes necessary.
No changes necessary.
Compare your config.pl file with the default distribution one. There have been quite a few configuration changes that have taken place.
Also, check your .htaccess file against htaccess.dist and note the important change (the removal of the line RewriteCond %{QUERY_STRING} ^$
You may also want to clear your visitor log file, as there was some significant changes in the way this file is read and written.
Compare your config.pl file with the default distribution one. There have been quite a few configuration changes that have taken place.
No changes necessary.
0.21 introduces a new variable to the config.pl file, called $FancyUrls. It is internally set to true (or 1) by default, however if you do not wish to use .htaccess for your install, you will need to set this variable to 0.
Before you apply the new version of the script, you will have to be sure to change the way items in the 'pages' directory are stored. Locate wherever your $DataDir is, and enter the pages directory. Take a list of the first letter of each of the page names located in here. You will then have to create a directory for each of those letters, and then move all the files that begin with that letter into their respective directories.
CategoryDocumentation