Normally I use Firefox or Chrome as my prefered webbrowser.
But I found out when I try to open the zabbix dashboard in IE9 it hangs on loading the dashboard site:

In the server log I can see the following entry every 10sec:
ClientIP - - [21/Jan/2013:10:08:58 +0100] "POST /zabbix/jsrpc.php?output=json-rpc HTTP/1.1" 200 63 "http://zabbixserver/zabbix/dashboard.php?ddreset=1&sid=3a82434c2108cfea" "Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 6.1; WOW64; Trident/5.0; SLCC2; .NET CLR 2.0.50727; .NET CLR 3.5.30729; .NET CLR 3.0.30729; Media Center PC 6.0; .NET4.0C; .NET4.0E; InfoPath.3)"
When I empty the IE9 cache it will work for a while and then the same error happend again.
But I found out when I try to open the zabbix dashboard in IE9 it hangs on loading the dashboard site:

In the server log I can see the following entry every 10sec:
ClientIP - - [21/Jan/2013:10:08:58 +0100] "POST /zabbix/jsrpc.php?output=json-rpc HTTP/1.1" 200 63 "http://zabbixserver/zabbix/dashboard.php?ddreset=1&sid=3a82434c2108cfea" "Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 6.1; WOW64; Trident/5.0; SLCC2; .NET CLR 2.0.50727; .NET CLR 3.5.30729; .NET CLR 3.0.30729; Media Center PC 6.0; .NET4.0C; .NET4.0E; InfoPath.3)"
When I empty the IE9 cache it will work for a while and then the same error happend again.