If you are using PHP 5 scripts on a 1AND1 hosting package, they willl be updating the current PHP version to cover a few security holes and you may have to update your PHP code accordingly to avoid any issues.

This only for those using PHP 5.

so on 7th and 08th December, their current version 5.1.6 will be updated to 5.2.0 on all 1and1 servers.

so can get details of the changes in deployment here http://www.php.net/UPDATE_5_2.txt

DaveN