I’ve discovered that Google has blacklisted Brainstorm Warning as infected by malware. I have reviewed the site code, found no evidence of malware, and requested a review from Google using their Webmaster Tools.
I’m guessing that my previous battles with SQL injection attacks (involving base64_decode and several hours of cleanup) landed me on the blacklist.
I apologize for any inconvenience this may have caused. I will post again after I receive word back from Google that Brainstorm Warning has been cleared.