section disappea r - error msg

[xMOe]

Hello guys
this error appear and sections disappear i just see the statistic and last post

Warning: array_keys() [function.array-keys]: The first argument should be an array in /includes/functions.php on line 3863

Warning: Invalid argument supplied for foreach() in /includes/functions.php on line 3863

Warning: Invalid argument supplied for foreach() in /index.php(63) : eval()'d code on line 8

anyone can help

[Paul M]

Disable any modifications you have and see if the error still occurs.