osCommerce - fix bug #1054

I have noticed a small bug in my osCommerce shop after having moved a site to a new server which appears to have mysql 5 installed. I get the following error when clicking on menu category links: 1054 - Unknown column 'p.products_id' in 'on clause' select distinct p.products_id, p.products_image, p.products_tax_class_id, [login to view URL] as specstat, s.specials_new_products_price, p.products_price from products p left join specials s on p.products_id = s.products_id, products_to_categories p2c, categories c left join featured f on p.products_id = f.products_id where p.products_id = p2c.products_id and p2c.categories_id = c.categories_id and c.parent_id = '73' and p.products_status = '1' and [login to view URL] = '1' order by rand() DESC limit 6 I believe this is something to do with the Ultimate SEO url contribution though I have applied the fixes noted in forums without success - I have now removed the fixes ( I am using Ultimate SEO Url's package: Ultimate_SEO_URLsv21da ) In apache error log I can see: [Sat Jul 7 18:47:02 2007] [error] PHP Warning: Cannot modify header information - headers already sent by (output started at /path/to/includes/[login to view URL]) in /path/to/includes/classes/[login to view URL] on line 1995