With the latest version (version 6) of Google Chrome when you stumble upon an insecure web site, Google may show you a picture of a red skull and crossbones in the address bar. Here is a picture of what it may look like:

There is a thread at the Google Chrome Help forum with tons of complaints. One person said, “I wish they would change it back. The skull and crossbones looks way too serious.”

The thing is, the security prompts comes up for security prompts such as the page being secure but also containing elements that are not secure. For example, if you have AdSense on an SSL page, it might show the red skull. Technically, the page itself is very secure and the contents of what is being passed on the page (minus some of the elements) are secure but Google is showing this very serious looking warning.

Brian from Google said:

Then after additional complaints, Tony from Google said they might swap it out:

Think this skull and crossbones is too severe? I think it depends on how insecure the page is.

Forum discussion at Google Chrome Help.