Upgrades from previous installations through cPanel should be seamless.  You must wait for your web host to upgrade to the latest version of the addon or cPanel for the upgrade/installer for 2.3 to appear.

cPanel is showing their love for Perl by supporting YaBB as the recommended forum system (BBS) and creating an installer within cPanel.  Information on cPanel can be found at http://www.cpanel.net.

The YaBB installer in cPanel has been in since cPanel version 10.8.2-RELEASE 83.  This will allow webmasters to install YaBB with the click of a button within their hosting control panel.  Multiple installs can be done, and upgrades will be available for all of those installs with the click of a button too!

Thanks go to Dan over at cPanel for this masterpiece.

News item - cPanel Installer Updates to 2.3.