If no icons exist in the database, undefined index errors appear in the map configuration page:

    Undefined index: defaultIconId [sysmap.php:202 ? CView->render() ? include() in /opt/lampp/htdocs/zabbix/trunk/frontends/php/include/views/configuration.sysmap.constructor.php:101]
    Undefined index: defaultIconName [sysmap.php:202 ? CView->render() ? include() in /opt/lampp/htdocs/zabbix/trunk/frontends/php/include/views/configuration.sysmap.constructor.php:102]

Broken in:
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r38040 | vitalij | 2013-08-22 10:59:35 +0300 (Thu, 22 Aug 2013) | 1 line

..F....... ZBX-6868 maps default add icon defined in defines.inc.php
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