I can't run Availability report (next AVR) on any server. When I click on AVR I see waiting for server. Tried many browsers (IE8, FF, Chrome) and Windows XP , Debian, Ubuntu as desktop client.
I have tried production server S1, I see time exceeded in apache log with php5 max_execution_time = 300. With max_execution_time = 600 I don't see anything in log.
So i did mysqldump --single-transaction --master-data zabbix > zabbix.sql and uploaded this database to S2 and S3 with mysql zabbix < zabbix.sql
On any server AVR don't work. Results are equal. Only what I see is "waiting for server"

I had problems with AVR from beginning (year 2010) when I switched from Nagios to Zabbix 1.8.x . They don't work or they was slow. But I had one version where AVR works (can't remember which version). I upgraded zabbix only with stable releases to current stable 1.8.10.

My zabbix configuration :

REPORT
Parameter Value Details
Zabbix server is running No localhost:10051
Number of hosts (monitored/not monitored/templates) 1479 1422 / 4 / 53
Number of items (monitored/disabled/not supported) 6806 6308 / 262 / 236
Number of triggers (enabled/disabled)[problem/unknown/ok] 3705 3701 / 4 [25 / 252 / 3424]
Number of users (online) 6 2
Required server performance, new values per second 134.36 -