Hai ragione, ecco i warning che mi presenta:
Warning: strtotime() [function.strtotime]: It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected 'UTC' for 'GMT/0.0/no DST' instead in /usr/local/www/metreta.com/www/libraries/joomla/utilities/date.php on line 56
Warning: strftime() [function.strftime]: It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected 'UTC' for 'GMT/0.0/no DST' instead in /usr/local/www/metreta.com/www/libraries/joomla/utilities/date.php on line 250
Considera che il sito risiede su un server estero e probabilmente è quella la causa.
ciao e grazie