AVG: http://www.avgthreatlabs.com/website-safety-reports/domain/boo.pl/ SUCURI FINDS THE JAVA MALWARE: http://sitecheck.sucuri.net/scanner/?scan=http%3A%2F%2Fblog.wojtek.boo.pl%2F
Its just at the top of the Site Code. (Screenshot) So your site got hacked most probaply.