Case Sensitive checkAgain.png => checkagain.png
File does not exist: /var/www/vtigercrm/include/install/images/checkAgain.png, referer: http://vtiger.example.com/include/install/install.css

http://trac.vtiger.com/cgi-bin/trac.cgi/ticket/7442
Updated backport of favicon.ico from v6.0.0
Initial Source: http://trac.vtiger.com/cgi-bin/trac.cgi/browser/vtigercrm/branches/6.0.0?rev=13865&order=name
Typo in comment in config.inc.php generation during install