Does High Fructose Corn Syrup Cause Obesity and Diabetes?

Could high fructose corn syrup (HFCS) be a cause for the rise in obesity, diabetes and other medical problems? Should you be concerned about it in your daily diet?
Pick up almost any product in your kitchen and you will see high fructose corn syrup listed in the ingredients. You might wonder how can it be bad for your health when it is just corn and fructose. There is more to gaining weight than just calories.  Take a look at this Factoidz article.

If you really want to dig deeper, take a look at this lecture.  Give yourself time to watch this.  It has some technical detail, but is REALLY important to watch.

Here's a very simplified version of the longer lecture: