Ok, well, taking a closer look:
Warning: require(/home/chibifurs/public_html/inc/smarty/Smarty.class.php): failed to open stream: No such file or directory in /home/chibifu2/public_html/classes/class_mysidia.php on line 326
Those should, obviously,
match. Change everything that uses chibifurs to chibifu2 in all the files we've touched so far.