Yeah, my father called me too because ebay blocked my url, as google listed me as unsafe. We changed nothing about the code in months. My husband just started to check the logs and files and if we can't find anything we're gonna ask google what the problem is.
Thanks for notifying me too, Chii!

EDIT: There is nothing wrong with the server. Nobody broke in, there is no malware. Norton, the biggest virus checker, says my site is safe. McAfee is unsure about "potentially unwanted programs" but says the files are safe. Google's help tool lists gallery pics and my index file as the problem! There is nothing bad inside. We wrote to Google to get a review by hand, so I hope this will be fixed soon before all my visitors are gone due to some bug in anti-virus software!