Not sure hot to report this. Be careful!! I bumped into it using Ubuntu system.
I went to read Matt's article here:
then I checked out the link upper left from that page titled New Theme: Inuit Types. When I click through and go to author's page, browser is hijacked!!!!
Reference from Ian Steward's wordpress.com page:
Direct wordpress.org theme page:
Same thing if you go to this page directly: