Google Mistakenly Labels Some Sites As Harmful

A webmaster posted in the Google Webmaster Help forums about his site containing the "The site ahead contains harmful programs" warning. The warning looks like this when try to go visit the page on Chrome:

Interestingly enough, Google's Eric Kuan replied saying this was fixed on Google's end. He wrote in the thread:

Thanks for your reports! The engineering team was able to identify and resolve the issue.

I wonder how many other sites were mislabeled as being harmful to users?

I wonder how much of an issue this is out there?

Forum discussion at Google Webmaster Help.