The problem is php 5.3.* deprecated some functions.
so when you run osCommerce on php 5.3.* it gives warnings.
you can find deprecated functions here:
http://php.net/manual/en/migration53.deprecated.php
there is two ways to fix this.
1. replace all the deprecated functions with
equivalent alternative one (the hard way)
exmp:
replace eregi("[regex]", $str) with preg_match("/[regex]/i", $str)
2. disable deprecated warning from php.ini file.
set error reporting value to this: error_reporting = E_ALL & ~E_DEPRECATED
3. use php 5.2.*
