Lots of Open source carts like Zen Cart, OS Commerce, OSCMax, Creloaded and many other derivitives have been having this issue upon upgrade to mysql 5.
Here is a sample error:
1054 - Unknown column 'p.products_id' in 'on clause'
Some of them also say TEP Stop or TET Stop or [TEP Stop] in red letters or similar at the bottom of the error output.select count(p.products_id) as total from products_description pd, products p left join manufacturers m on p.manufacturers_id = m.manufacturers_id, products_to_categories p2c left join specials s on p.products_id = s.products_id where p.products_status = '1' and p.products_id = p2c.products_id and pd.products_id = p2c.products_id and pd.language_id = '1' and p2c.categories_id = '27'
Possible solutions are below