(Warning: date() expects parameter 2 to be long)

Just got this error message after two years of smooth running and absolutely no problems:

Quote:

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Warning: date() expects parameter 2 to be long, string given in /customers/skedsmobluesklubb.com/skedsmobluesklubb.com/httpd.www/system/drivers/DC_Table.php on line 3579
Warning: date() expects parameter 2 to be long, string given in /customers/skedsmobluesklubb.com/skedsmobluesklubb.com/httpd.www/system/drivers/DC_Table.php on line 3580
Warning: Cannot modify header information - headers already sent by (output started at /customers/skedsmobluesklubb.com/skedsmobluesklubb.com/httpd.www/system/functions.php:119) in /customers/skedsmobluesklubb.com/skedsmobluesklubb.com/httpd.www/system/libraries/Template.php on line 142

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The site is running on a quite old version 2.5

Cant figure out the reason for this so help would be greatly appreciated

Regards
E