I believe Mr pinback knows of what he speaks.Bacillus cereus. Notorious for poisoning people via mis-handled rice
A long time ago I worked for a supermarket and when we did the food hygiene bit (which was quite thorough), this was the bit that seemed to worry the business the most. They used flash cooling, and labelling for the customer as to subsequent treatment, and took it very seriously.
Still never stopped me eating left-over takeaways from the carton.