I wanted to upgrade my ClamAV but ./configure gave this error checking for zlib installation... /usr configure: error: The installed zlib version may contain a security bug. Please upgrade to 1.2.2 or later: http://www.zlib.net. You can omit this check with --disable-zlib-vcheck but DO NOT REPORT any stablility issues then! but yum gave this message # yum install zlib Gathering header information file(s) from server(s) Server: CentOS-3.3 - Addons Server: CentOS-3.3 - Base Server: CentOS-3.3 - Extras Server: CentOS-3.3 - Updates Finding updated packages Downloading needed headers zlib is installed and is the latest version. No actions to take is it safe to install ClamAV with the --disable-zlib-vcheck option ? -- This message has been scanned for viruses and dangerous content by OpenProtect(http://www.openprotect.com), and is believed to be clean.