Warning Message: This site may be unsafe.#

I have a site where some visitors are getting a warning message that says the site may be unsafe. I did see this one time myself, but didn't capture the exact message. The site owners have also heard from multiple clients that have seen this warning.

The site is hosted on HostGator. I called their support folks and asked them to look into it. They said their security people found nothing to indicate a problem. This site has been up for about 18 months now and was upgraded to 1.0.3 this past spring. Globals is turned off.

I think this is a browser warning vs workstation security such as AVG. Not sure.

I'm looking for suggestions for next steps. The site owner is getting concerned, but I'm not sure what to tell them.

Thoughts?

What's the website in question and do you notice any strange code being output on the site?

might be related: http://modxcms.com/forums/index.php/topic,52543.0.html

Thanks everyone.

This is the site in question. http://www.twptown.org/

I did find the eval(base64_decode... in the document.parser.class.inc.php so it seems this is the problem.

I will continue this in the other thread since it is already started and on point.

Thank you!

Terry