If I write a german-umlaut (äöü) into description of a map-element, after pushing the apply-button I got this Java-Script PopUp. "Get Img: Element data not found!" If I save the map now, every map-element was deleted!

If I change the description directly via mysql, zabbix-frontend only displays the map-elemts, but not the description, links and background of the map.
Further I got this PHP-Errors:

PHP Notice: Undefined index: elementid in /srv/www/vhosts/zabbix/httpdocs/include/maps.inc.php on
line 560, referer: http://zabbix/sysmap.php?sysmapid=3&sid=1b8e5d82ae8e44a8
PHP Notice: Undefined index: elementid in /srv/www/vhosts/zabbix/httpdocs/include/maps.inc.php on
line 569, referer: http://zabbix/sysmap.php?sysmapid=3&sid=1b8e5d82ae8e44a8
PHP Notice: Undefined index: elementid in /srv/www/vhosts/zabbix/httpdocs/include/maps.inc.php on
line 580, referer: http://zabbix/sysmap.php?sysmapid=3&sid=1b8e5d82ae8e44a8
PHP Notice: Undefined index: elementid in /srv/www/vhosts/zabbix/httpdocs/include/maps.inc.php on
line 688, referer: http://zabbix/sysmap.php?sysmapid=3&sid=1b8e5d82ae8e44a8
PHP Warning: mysql_fetch_assoc(): supplied argument is not a valid MySQL result resource in /srv/ww
w/vhosts/zabbix/httpdocs/include/db.inc.php on line 546, referer: http://zabbix/sysmap.php?sysmapid=3&sid=1b8e5d82ae8e44a8
PHP Warning: mysql_free_result(): supplied argument is not a valid MySQL result resource in /srv/ww
w/vhosts/zabbix/httpdocs/include/db.inc.php on line 548, referer: http://zabbix/sysmap.php?sysmapid=3&sid=1b8e5d82ae8e44a8
PHP Notice: Undefined index: iconid_off in /srv/www/vhosts/zabbix/httpdocs/include/maps.inc.php on
line 775, referer: http://zabbix/sysmap.php?sysmapid=3&sid=1b8e5d82ae8e44a8
PHP Warning: mysql_fetch_assoc(): supplied argument is not a valid MySQL result resource in /srv/ww
w/vhosts/zabbix/httpdocs/include/db.inc.php on line 546, referer: http://zabbix/sysmap.php?sysmapid=3&sid=1b8e5d82ae8e44a8
PHP Warning: mysql_free_result(): supplied argument is not a valid MySQL result resource in /srv/ww
w/vhosts/zabbix/httpdocs/include/db.inc.php on line 548, referer: http://zabbix/sysmap.php?sysmapid=3&sid=1b8e5d82ae8e44a8
PHP Warning: Invalid argument supplied for foreach() in /srv/www/vhosts/zabbix/httpdocs/map.php on
line 256, referer: http://zabbix/sysmap.php?sysmapid=3&sid=1b8e5d82ae8e44a8
request failed: URI too long (longer than 8190)