dipende dal fatto che richiedi il passaggio per riferimento del risultato della funzione mysql_query.

Passare i dati per riferimento chiamando una funzione e' deprecato. E prossimamente non piu' supportato
; Whether to enable the ability to force arguments to be passed by reference
; at function call time. This method is deprecated and is likely to be
; unsupported in future versions of PHP/Zend. The encouraged method of
; specifying which arguments should be passed by reference is in the function
; declaration. You're encouraged to try and turn this option Off and make
; sure your scripts work properly with it in order to ensure they will work
; with future versions of the language (you will receive a warning each time
; you use this feature, and the argument will be passed by value instead of by
; reference).
allow_call_time_pass_reference = Off
Forse hanno cambiato la versione di php e adottato quanto sopra nel php.ini