Argh!! You probably have an older version of PHP. Can you verify if you are running PHP 4 or 5? Please see this thread: viewtopic.php?f=2&t=16
. Might be a good idea to upgrade.
I am in the process of finalizing the next release, which accounts for PHP 4 as well, so you might want to wait a couple of days if you don't want to implement the fix that I have provided. You can download the 2.5.4 version here: http://wordpress.org/extend/themes/down ... .2.5.4.zip
if you want to restore the older version.