I am using CiviCRM 4.5.8, an instance with 18,328 contacts.
No matter how long I set the max execution time of a page, I am getting a timeout when trying to view the constituent detail report (instance 2). The other reports all work fine.
Has anyone ever experienced this? Can anyone think of a reason this might be happening? The PHP error logs are showing nothing but a timeout, and the CiviCRM log is showing nothing.
Update: It seems to be related to Activities. If I create a new report based on constituent detail, and uncheck all the activity columns from being used, then the report is produced ok. If I check one column to do with activities again, then it stops working and times out.