There are too many errors coming into the apache error log

1. PHP Notice: Function sql_paging_limit() is deprecated. Replace it with the correct use of limitfrom, limitnum parameters

2. PHP Notice: Undefined property: stdClass::$answered in email/email.class.php on line 744

3. PHP Notice: print_header() was sent a string as 3rd ... This is deprecated in favour of an array built by build_navigation(). Please upgrade your code

4. PHP Notice: Trying to get property of non-object in email/email.class.php on line 516

5. PHP Notice: Undefined variable: mail in email/email.class.php on line 507

6. PHP Notice: Trying to get property of non-object in email/email.class.php on line 507

7. PHP Notice: Trying to get property of non-object in email/email.class.php on line 516

etc ...