Default favicon missing

Warning: MySQL server has gone away query: INSERT INTO watchdog (uid, type, message, variables, severity, link, location, referer, hostname, timestamp) VALUES (1, 'php', '%message in %file on line %line.', 'a:4:{s:6:\"%error\";s:12:\"user warning\";s:8:\"%message\";s:518:\"MySQL server has gone away\nquery: INSERT INTO watchdog\n (uid, type, message, variables, severity, link, location, referer, hostname, timestamp)\n VALUES\n (1, 'urlicon', 'Could not find favicon for URL <em>http://www.mysite.com/an/about-us</em> in metatags, trying webroot.', 'a:0:{}', 5, '', 'http://www.mysite.com/admin/settings/filters', 'http://www.mysite.com/admin/settings/filters/1', '59.00.0.254', 1219679288)\";s:5:\"%file\";s:53:\"/home/host/public_html/modules/dblog/dblog.mo in /home/host/public_html/includes/database.mysqli.inc on line 128

I got this after activating URL icon filter in Input formats today..