I use to owerwrite all the files of my wordpress 2,0,0 with the files from wordpress 2,0,2. (Except wp-config.php and wp-settings.php or smth.)
Some my plugins stops working - throws errors :
cannot redeclare <some function name>
after deactivation and activation of the plugin nothin changes at all.
How to upgrade my WP 2,0,0 to 2,0,2 with no loss of data and plugin configuation.