Google has a new service that will flag your site as possibly being harmful to a computer. Apparently they are using http://www.stopbadware.org to scan search results for any malware. I do keyword searches for my site sometimes to help identify good keywords. My site and all other home inspector sites came up with a warning that says “the site may be harmful to your computer”. If you click on the site you are directed to a warning page.
You have to go through Google webmaster tools and ask for a review. I do not know why my site was flagged. In the webmaster tools there is a link with the diagnostics on why it was flagged, but mine says no malware detected. I asked for the review.
I used “home inspector, Oak Forest Home inspector, Chicago home inspector and variations”. It seems that it does not come up all the time, I did a search for Bruce Springsteen and every site on the first page of results including Wikipedia was labeled as harmful. I do not understand the technical aspects, but it seems you could lose some business if your site is flagged. Here are two links with info. http://www.searchtank.net/2007/02/google-this-site-may-harm-your-computer.html
I experienced the same problem several months ago. All I did was send an email into the Google support staff and request that they review the site. It took less than a day for them to respond and my site was not flagged anymore.