Quick Security Alerts for Week Ending 4/20/2008 Posted onApril 21, 2008AuthorThomas GideonLeave a comment I got in too late last night to post these and didn’t think to do so yesterday when I had some spare time at Penguicon 6.0. Is it time to move past captcha’s? Security updates to Firefox, Safari An OSX security primer Exploiting null pointer de-references