For the last three weeks I've had several messages a day from friendly strangers telling me that Google is warning users about this site; specifically, that it may install malicious software on your computer. Despite Matt Cutts's denial of any false positives so far, I'm almost certain that there's a mistake here. Google has given me no warning, no reason and no reply to my repeated appeals for a review. In protest, I'm staging a one-man boycott of Google search, but they don't seem to have noticed yet.
Update: the warning was silently dropped, four weeks after it was instated.